diff --git a/scripts/flash_mcu.sh b/scripts/flash_mcu.sh
new file mode 100755
index 0000000..f9299eb
--- /dev/null
+++ b/scripts/flash_mcu.sh
@@ -0,0 +1,279 @@
+#!/bin/bash
+
+show_flash_method_help(){
+  top_border
+  echo -e "|     ~~~~~~~~ < ? > Help: Flash MCU < ? > ~~~~~~~~     |"
+  hr
+  echo -e "| ${cyan}Regular flashing method:${default}                              |"
+  echo -e "| The default method to flash controller boards which   |"
+  echo -e "| are connected and updated over USB and not by placing |"
+  echo -e "| a compiled firmware file onto an internal SD-Card.    |"
+  blank_line
+  echo -e "| Common controllers that get flashed that way are:     |"
+  echo -e "| - Arduino Mega 2560                                   |"
+  echo -e "| - Fysetc F6 / S6 (used without a Display + SD-Slot)   |"
+  blank_line
+  echo -e "| ${cyan}Updating via SD-Card Update:${default}                          |"
+  echo -e "| Many popular controller boards ship with a bootloader |"
+  echo -e "| capable of updating the firmware via SD-Card.         |"
+  echo -e "| Choose this method if your controller board supports  |"
+  echo -e "| this way of updating. This method ONLY works for up-  |"
+  echo -e "| grading firmware. The initial flashing procedure must |"
+  echo -e "| be done manually per the instructions that apply to   |"
+  echo -e "| your controller board.                                |"
+  blank_line
+  echo -e "| Common controllers that can be flashed that way are:  |"
+  echo -e "| - BigTreeTech SKR 1.3 / 1.4 (Turbo) / E3 / Mini E3    |"
+  echo -e "| - Fysetc F6 / S6 (used with a Display + SD-Slot)      |"
+  echo -e "| - Fysetc Spider                                       |"
+  blank_line
+  back_footer
+  while true; do
+    read -p "${cyan}###### Please select:${default} " choice
+    case "$choice" in
+      B|b)
+        clear && print_header
+        select_flash_method
+        break;;
+      *)
+        print_unkown_cmd
+        print_msg && clear_msg;;
+    esac
+  done
+}
+
+select_flash_method(){
+  top_border
+  echo -e "|        ~~~~~~~~~~~~ [ Flash MCU ] ~~~~~~~~~~~~        |"
+  hr
+  echo -e "| Please select the flashing method to flash your MCU.  |"
+  echo -e "| Make sure to only select a method your MCU supports.  |"
+  echo -e "| Not all MCUs support both methods!                    |"
+  hr
+  blank_line
+  echo -e "| 1) Regular flashing method                            |"
+  echo -e "| 2) Updating via SD-Card Update                        |"
+  blank_line
+  back_help_footer
+  while true; do
+    read -p "${cyan}###### Please select:${default} " choice
+    case "$choice" in
+      1)
+        echo -e "###### > Regular flashing method"
+        select_mcu_connection
+        select_mcu_id
+        [ CONFIRM_FLASH ] && flash_mcu
+        break;;
+      2)
+        echo -e "###### > SD-Card Update"
+        select_mcu_connection
+        select_mcu_id
+        [ CONFIRM_FLASH ] && flash_mcu_sd
+        break;;
+      B|b)
+        advanced_menu
+        break;;
+      H|h)
+        clear && print_header
+        show_flash_method_help
+        break;;
+      *)
+        print_unkown_cmd
+        print_msg && clear_msg;;
+    esac
+  done
+}
+
+select_mcu_id(){
+  if [ ${#mcu_list[@]} -ge 1 ]; then
+    top_border
+    echo -e "|                   ${red}!!! ATTENTION !!!${default}                   |"
+    hr
+    echo -e "| Make sure, to select the correct MCU!                 |"
+    echo -e "| ${red}ONLY flash a firmware created for the respective MCU!${default} |"
+    bottom_border
+    echo -e "${cyan}###### List of available MCU:${default}"
+    ### list all mcus
+    id=0
+    for mcu in ${mcu_list[@]}; do
+      let id++
+      echo -e " $id) $mcu"
+    done
+    ### verify user input
+    sel_index=""
+    while [[ ! ($sel_index =~ ^[1-9]+$) ]] || [ $sel_index -gt $id ]; do
+      echo
+      read -p "${cyan}###### Select MCU to flash:${default} " sel_index
+      if [[ ! ($sel_index =~ ^[1-9]+$) ]]; then
+        warn_msg "Invalid input!"
+      elif [ $sel_index -lt 1 ] || [ $sel_index -gt $id ]; then
+        warn_msg "Please select a number between 1 and $id!"
+      fi
+      mcu_index=$(echo $((sel_index - 1)))
+      selected_mcu_id="${mcu_list[$mcu_index]}"
+    done
+    ### confirm selection
+    while true; do
+      echo -e "\n###### You selected:\n ● MCU #$sel_index: $selected_mcu_id\n"
+      read -p "${cyan}###### Continue? (Y/n):${default} " yn
+      case "$yn" in
+        Y|y|Yes|yes|"")
+          echo -e "###### > Yes"
+          status_msg "Flashing $selected_mcu_id ..."
+          CONFIRM_FLASH="true"
+          break;;
+        N|n|No|no)
+          echo -e "###### > No"
+          CONFIRM_FLASH="false"
+          break;;
+        *)
+          print_unkown_cmd
+          print_msg && clear_msg;;
+      esac
+    done
+  fi
+}
+
+flash_mcu(){
+  do_action_service "stop" "klipper"
+  if ! make flash FLASH_DEVICE="${mcu_list[$mcu_index]}" ; then
+    warn_msg "Flashing failed!"
+    warn_msg "Please read the console output above!"
+  else
+    ok_msg "Flashing successfull!"
+  fi
+  do_action_service "start" "klipper"
+}
+
+flash_mcu_sd(){
+  do_action_service "stop" "klipper"
+
+  ### write each supported board to the array to make it selectable
+  board_list=()
+  for board in $(~/klipper/scripts/flash-sdcard.sh -l | tail -n +2); do
+    board_list+=($board)
+  done
+
+  i=0
+  top_border
+  echo -e "|  Please select the type of board that corresponds to  |"
+  echo -e "|  the currently selected MCU ID you chose before.      |"
+  blank_line
+  echo -e "|  The following boards are currently supported:        |"
+  hr
+  ### display all supported boards to the user
+  for board in ${board_list[@]}; do
+    if [ $i -lt 10 ]; then
+      printf "|  $i) %-50s|\n" "${board_list[$i]}"
+    else
+      printf "|  $i) %-49s|\n" "${board_list[$i]}"
+    fi
+    i=$((i + 1))
+  done
+  quit_footer
+
+  ### make the user select one of the boards
+  while true; do
+    read -p "${cyan}###### Please select board type:${default} " choice
+    if [ $choice = "q" ] || [ $choice = "Q" ]; then
+      clear && advanced_menu && break
+    elif [ $choice -le ${#board_list[@]} ]; then
+      selected_board="${board_list[$choice]}"
+      break
+    else
+      clear && print_header
+      ERROR_MSG="Invalid choice!" && print_msg && clear_msg
+      flash_mcu_sd
+    fi
+  done
+
+  while true; do
+    top_border
+    echo -e "| If your board is flashed with firmware that connects  |"
+    echo -e "| at a custom baud rate, please change it now.          |"
+    blank_line
+    echo -e "| If you are unsure, stick to the default 250000!       |"
+    bottom_border
+    echo -e "${cyan}###### Please set the baud rate:${default} "
+    unset baud_rate
+    while [[ ! $baud_rate =~ ^[0-9]+$ ]]; do
+      read -e -i "250000" -e baud_rate
+      selected_baud_rate=$baud_rate
+      break
+    done
+  break
+  done
+
+  if ! ${HOME}/klipper/scripts/flash-sdcard.sh -b "$selected_baud_rate" "$selected_mcu_id" "$selected_board" ; then
+    warn_msg "Flashing failed!"
+    warn_msg "Please read the console output above!"
+  else
+    ok_msg "Flashing successfull!"
+  fi
+
+  do_action_service "start" "klipper"
+}
+
+build_fw(){
+  if [ -d $KLIPPER_DIR ]; then
+    cd $KLIPPER_DIR
+    status_msg "Initializing firmware build ..."
+    dep=(build-essential dpkg-dev make)
+    dependency_check
+    make clean && make menuconfig
+    status_msg "Building firmware ..."
+    make && ok_msg "Firmware built!"
+  else
+    warn_msg "Can not build firmware without a Klipper directory!"
+  fi
+}
+
+select_mcu_connection(){
+  echo
+  top_border
+  echo -e "| ${yellow}Make sure to have the controller board connected now!${default} |"
+  blank_line
+  echo -e "| How is the controller board connected to the host?    |"
+  echo -e "| 1) USB                                                |"
+  echo -e "| 2) UART                                               |"
+  bottom_border
+  while true; do
+    read -p "${cyan}###### Connection method:${default} " choice
+    case "$choice" in
+      1)
+        retrieve_id "USB"
+        break;;
+      2)
+        retrieve_id "UART"
+        break;;
+      *)
+        print_unkown_cmd
+        print_msg && clear_msg;;
+    esac
+  done
+  unset mcu_count
+
+  if [[ "${#mcu_list[@]}" -lt 1 ]]; then
+    warn_msg "No MCU found!"
+    warn_msg "MCU not plugged in or not detectable!"
+    echo
+  fi
+}
+
+retrieve_id(){
+  status_msg "Identifying MCU ..."
+  sleep 1
+  mcu_list=()
+  mcu_count=1
+  [ "$1" = "USB" ] && path="/dev/serial/by-id/*"
+  [ "$1" = "UART" ] && path="/dev/ttyAMA0"
+  if [[ "$(ls $path)" != "" ]] ; then
+    for mcu in $path; do
+      declare "mcu_id_$mcu_count"="$mcu"
+      mcu_id="mcu_id_$mcu_count"
+      mcu_list+=("${!mcu_id}")
+      echo -e " ● ($1) MCU #$mcu_count: ${cyan}$mcu${default}\n"
+      let mcu_count++
+    done
+  fi 2>/dev/null
+}
diff --git a/scripts/install_klipper.sh b/scripts/install_klipper.sh
index a3b4643..ce9b907 100755
--- a/scripts/install_klipper.sh
+++ b/scripts/install_klipper.sh
@@ -176,246 +176,3 @@ create_klipper_service(){
     unset i
   fi
 }
-
-flash_routine(){
-  echo
-  top_border
-  echo -e "|        ${red}~~~~~~~~~~~ [ ATTENTION! ] ~~~~~~~~~~~~${default}        |"
-  hr
-  echo -e "| Flashing a Smoothie based board with this method will |"
-  echo -e "| certainly fail. This applies to boards like the SKR   |"
-  echo -e "| V1.3 / V1.4. You have to copy the firmware file to    |"
-  echo -e "| the SD card manually and rename it to 'firmware.bin'. |"
-  hr
-  echo -e "| You can find the file in: ~/klipper/out/klipper.bin   |"
-  bottom_border
-  while true; do
-    read -p "${cyan}###### Do you want to continue? (Y/n):${default} " yn
-    case "$yn" in
-      Y|y|Yes|yes|"")
-        echo -e "###### > Yes"
-        FLASH_FIRMWARE="true"
-        get_mcu_id
-        break;;
-      N|n|No|no)
-        echo -e "###### > No"
-        FLASH_FIRMWARE="false"
-        break;;
-      *)
-        print_unkown_cmd
-        print_msg && clear_msg;;
-    esac
-  done
-}
-
-flash_routine_sd(){
-  echo
-  top_border
-  echo -e "|        ${red}~~~~~~~~~~~ [ ATTENTION! ] ~~~~~~~~~~~~${default}        |"
-  hr
-  echo -e "| If you have a Smoothie based board with an already    |"
-  echo -e "| flashed Klipper Firmware, you can now choose to flash |"
-  echo -e "| directly from the internal SD if your control board   |"
-  echo -e "| is supported by that function.                        |"
-  bottom_border
-  while true; do
-    read -p "${cyan}###### Do you want to continue? (Y/n):${default} " yn
-    case "$yn" in
-      Y|y|Yes|yes|"")
-        echo -e "###### > Yes"
-        FLASH_FW_SD="true"
-        get_mcu_id
-        break;;
-      N|n|No|no)
-        echo -e "###### > No"
-        FLASH_FW_SD="false"
-        break;;
-      *)
-        print_unkown_cmd
-        print_msg && clear_msg;;
-    esac
-  done
-}
-
-select_mcu_id(){
-  if [ ${#mcu_list[@]} -ge 1 ]; then
-    echo
-    top_border
-    echo -e "|                   ${red}!!! ATTENTION !!!${default}                   |"
-    hr
-    echo -e "| Make sure, to select the correct number for the MCU!  |"
-    echo -e "| ${red}ONLY flash a firmware created for the respective MCU!${default} |"
-    bottom_border
-    echo -e "${cyan}###### List of available MCU:${default}"
-    ### list all mcus
-    id=0
-    for mcu in ${mcu_list[@]}; do
-      let id++
-      echo -e " $id) $mcu"
-    done
-    ### verify user input
-    sel_index=""
-    while [[ ! ($sel_index =~ ^[1-9]+$) ]] || [ $sel_index -gt $id ]; do
-      echo
-      read -p "${cyan}###### Select MCU to flash:${default} " sel_index
-      if [[ ! ($sel_index =~ ^[1-9]+$) ]]; then
-        warn_msg "Invalid input!"
-      elif [ $sel_index -lt 1 ] || [ $sel_index -gt $id ]; then
-        warn_msg "Please select a number between 1 and $id!"
-      fi
-      mcu_index=$(echo $((sel_index - 1)))
-      selected_mcu_id="${mcu_list[$mcu_index]}"
-    done
-    ### process flashing
-    while true; do
-      echo -e "\n###### You selected:\n ● MCU #$sel_index: $selected_mcu_id\n"
-      read -p "${cyan}###### Continue? (Y/n):${default} " yn
-      case "$yn" in
-        Y|y|Yes|yes|"")
-          echo -e "###### > Yes"
-          status_msg "Flashing $selected_mcu_id ..."
-          if [ "$FLASH_FIRMWARE" = "true" ]; then
-            flash_mcu
-          fi
-          if [ "$FLASH_FW_SD" = "true" ]; then
-            flash_mcu_sd
-          fi
-          break;;
-        N|n|No|no)
-          echo -e "###### > No"
-          break;;
-        *)
-          print_unkown_cmd
-          print_msg && clear_msg;;
-      esac
-    done
-  fi
-}
-
-flash_mcu(){
-  do_action_service "stop" "klipper"
-  if ! make flash FLASH_DEVICE="${mcu_list[$mcu_index]}" ; then
-    warn_msg "Flashing failed!"
-    warn_msg "Please read the console output above!"
-  else
-    ok_msg "Flashing successfull!"
-  fi
-  do_action_service "start" "klipper"
-}
-
-flash_mcu_sd(){
-  do_action_service "stop" "klipper"
-
-  ### write each supported board to the array to make it selectable
-  board_list=()
-  for board in $(~/klipper/scripts/flash-sdcard.sh -l | tail -n +2); do
-    board_list+=($board)
-  done
-
-  i=0
-  top_border
-  echo -e "|  Please select the type of board that corresponds to  |"
-  echo -e "|  the currently selected MCU ID you chose before.      |"
-  blank_line
-  echo -e "|  The following boards are currently supported:        |"
-  hr
-  ### display all supported boards to the user
-  for board in ${board_list[@]}; do
-    if [ $i -lt 10 ]; then
-      printf "|  $i) %-50s|\n" "${board_list[$i]}"
-    else
-      printf "|  $i) %-49s|\n" "${board_list[$i]}"
-    fi
-    i=$((i + 1))
-  done
-  quit_footer
-
-  ### make the user select one of the boards
-  while true; do
-    read -p "${cyan}###### Please select board type:${default} " choice
-    if [ $choice = "q" ] || [ $choice = "Q" ]; then
-      clear && advanced_menu && break
-    elif [ $choice -le ${#board_list[@]} ]; then
-      selected_board="${board_list[$choice]}"
-      break
-    else
-      clear && print_header
-      ERROR_MSG="Invalid choice!" && print_msg && clear_msg
-      flash_mcu_sd
-    fi
-  done
-
-  while true; do
-    top_border
-    echo -e "| If your board is flashed with firmware that connects  |"
-    echo -e "| at a custom baud rate, please change it now.          |"
-    blank_line
-    echo -e "| If you are unsure, stick to the default 250000!       |"
-    bottom_border
-    echo -e "${cyan}###### Please set the baud rate:${default} "
-    unset baud_rate
-    while [[ ! $baud_rate =~ ^[0-9]+$ ]]; do
-      read -e -i "250000" -e baud_rate
-      selected_baud_rate=$baud_rate
-      break
-    done
-  break
-  done
-
-  if ! ${HOME}/klipper/scripts/flash-sdcard.sh -b "$selected_baud_rate" "$selected_mcu_id" "$selected_board" ; then
-    warn_msg "Flashing failed!"
-    warn_msg "Please read the console output above!"
-  else
-    ok_msg "Flashing successfull!"
-  fi
-
-  do_action_service "start" "klipper"
-}
-
-build_fw(){
-  if [ -d $KLIPPER_DIR ]; then
-    cd $KLIPPER_DIR
-    status_msg "Initializing firmware build ..."
-    dep=(build-essential dpkg-dev make)
-    dependency_check
-    make clean
-    make menuconfig
-    status_msg "Building firmware ..."
-    make && ok_msg "Firmware built!"
-  else
-    warn_msg "Can not build firmware without a Klipper directory!"
-  fi
-}
-
-### grab the mcu id
-get_mcu_id(){
-  echo
-  top_border
-  echo -e "| Please make sure your MCU is connected to the Pi!     |"
-  echo -e "| If the MCU is not connected yet, connect it now.      |"
-  bottom_border
-  echo -e "${cyan}"
-  read -p "###### Press ANY KEY to continue ... " -n 1 -r
-  echo -e "${default}"
-  status_msg "Identifying the ID of your MCU ..."
-  sleep 1
-  unset MCU_ID
-  ### if there are devices found, continue, else show warn message
-  if ls /dev/serial/by-id/* 2>/dev/null 1>&2; then
-    mcu_count=1
-    mcu_list=()
-    status_msg "The ID of your printers MCU is:"
-    ### loop over the IDs, write every ID as an item of the array 'mcu_list'
-    for mcu in /dev/serial/by-id/*; do
-      declare "mcu_id_$mcu_count"="$mcu"
-      mcu_id="mcu_id_$mcu_count"
-      mcu_list+=("${!mcu_id}")
-      echo " ● MCU #$mcu_count: ${cyan}$mcu${default}"
-      mcu_count=$(expr $mcu_count + 1)
-    done
-    unset mcu_count
-  else
-    warn_msg "Could not retrieve ID!"
-    warn_msg "Printer not plugged in or not detectable!"
-  fi
-}
diff --git a/scripts/ui/advanced_menu.sh b/scripts/ui/advanced_menu.sh
index f5f6f59..5f7cf5e 100755
--- a/scripts/ui/advanced_menu.sh
+++ b/scripts/ui/advanced_menu.sh
@@ -13,8 +13,8 @@ advanced_ui(){
   echo -e "|                           |  System:                  | "
   echo -e "|  Firmware:                |  8) [Change hostname]     | "
   echo -e "|  3) [Build only]          |                           | "
-  echo -e "|  4) [Build + Flash]       |  Extensions:              | "
-  echo -e "|  5) [Build + SD Flash]    |  9) [Shell Command]       | "
+  echo -e "|  4) [Flash only]          |  Extensions:              | "
+  echo -e "|  5) [Build + Flash]       |  9) [Shell Command]       | "
   echo -e "|  6) [Get MCU ID]          |                           | "
   echo -e "|                           |  CustomPiOS:              | "
   echo -e "|                           |  10) [Migration Helper]   | "
@@ -41,25 +41,16 @@ advanced_menu(){
       3)
         do_action "build_fw" "advanced_ui";;
       4)
-        clear && print_header
-        flash_routine
-        if [ $FLASH_FIRMWARE = "true" ]; then
-          status_msg "Please wait..." && sleep 3 && build_fw
-          select_mcu_id
-        fi
-        print_msg && clear_msg
-        advanced_ui;;
+        do_action "select_flash_method" "advanced_ui";;
       5)
         clear && print_header
-        flash_routine_sd
-        if [ $FLASH_FW_SD = "true" ]; then
-          status_msg "Please wait..." && sleep 3 && build_fw
-          select_mcu_id
-        fi
+        status_msg "Please wait..."
+        build_fw
+        select_flash_method
         print_msg && clear_msg
         advanced_ui;;
       6)
-        do_action "get_mcu_id" "advanced_ui";;
+        do_action "select_mcu_connection" "advanced_ui";;
       7)
         do_action "ms_theme_menu";;
       8)
diff --git a/scripts/ui/general_ui.sh b/scripts/ui/general_ui.sh
index a2d7d0b..459b29f 100755
--- a/scripts/ui/general_ui.sh
+++ b/scripts/ui/general_ui.sh
@@ -1,6 +1,6 @@
 #ui total width = 57 chars
 top_border(){
-  echo -e "/=======================================================\ "
+  echo -e "/=======================================================\\"
 }
 
 bottom_border(){
@@ -8,7 +8,7 @@ bottom_border(){
 }
 
 blank_line(){
-  echo -e "|                                                       | "
+  echo -e "|                                                       |"
 }
 
 hr(){
@@ -17,13 +17,19 @@ hr(){
 
 quit_footer(){
   hr
-  echo -e "|                        ${red}Q) Quit${default}                        | "
+  echo -e "|                        ${red}Q) Quit${default}                        |"
   bottom_border
 }
 
 back_footer(){
   hr
-  echo -e "|                        ${green}B) Back${default}                        | "
+  echo -e "|                       ${green}B) « Back${default}                       |"
+  bottom_border
+}
+
+back_help_footer(){
+  hr
+  echo -e "|         ${green}B) « Back${default}         |        ${yellow}H) Help [?]${default}        |"
   bottom_border
 }