diff --git a/sdcard.build/raspbianStretchDesktop.sh b/sdcard.build/raspbianStretchDesktop.sh
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+#########################################################################
+# Build your SD card image based on:
+# RASPBIAN STRETCH WITH DESKTOP (2018-06-27)
+# https://www.raspberrypi.org/downloads/raspbian/
+# SHA256: 8636ab9fdd8f58a8ec7dde33b83747696d31711d17ef68267dbbcd6cfb968c24
+##########################################################################
+# setup fresh SD card with image above - login per SSH and run this script
+##########################################################################
+
+# *** RASPI CONFIG ***
+# based on https://github.com/Stadicus/guides/blob/master/raspibolt/raspibolt_20_pi.md#raspi-config
+
+# A) Set Raspi to boot up automatically with user pi (for the LCD)
+# https://www.raspberrypi.org/forums/viewtopic.php?t=21632
+sudo raspi-config nonint do_boot_behaviour B2
+
+# B) Give Raspi a default hostname (optional)
+sudo raspi-config nonint do_hostname "RaspiBlitz"
+
+# do memory split (16MB)
+# TODO: sudo raspi-config nonint do_memory_split %d
+
+# *** SOFTWARE UPDATE ***
+# based on https://github.com/Stadicus/guides/blob/master/raspibolt/raspibolt_20_pi.md#software-update
+
+sudo apt-get update
+sudo apt-get upgrade
+sudo apt-get install htop git curl bash-completion jq dphys-swapfile
+
+# *** ADDING MAIN USER "admin" ***
+# based on https://github.com/Stadicus/guides/blob/master/raspibolt/raspibolt_20_pi.md#adding-main-user-admin
+# using the default password 'raspiblitz'
+
+# TODO: set password automatically
+sudo adduser admin
+sudo adduser admin sudo
+sudo chsh admin -s /bin/bash
+sudo passwd root
+
+# TODO
+# $ sudo visudo
+# %sudo  ALL=(ALL:ALL) ALL
+# %sudo   ALL=(ALL) NOPASSWD:ALL
+
+# *** ADDING SERVICE USER “bitcoin”
+# based on https://github.com/Stadicus/guides/blob/master/raspibolt/raspibolt_20_pi.md#adding-the-service-user-bitcoin
+
+sudo adduser bitcoin
+
+# *** SWAP FILE ***
+# based on https://github.com/Stadicus/guides/blob/master/raspibolt/raspibolt_20_pi.md#moving-the-swap-file
+# but just deactivating and deleting old (will be created alter when user adds HDD)
+
+sudo dphys-swapfile swapoff
+sudo dphys-swapfile uninstall
+
+# --> CONTINUE: https://github.com/Stadicus/guides/blob/master/raspibolt/raspibolt_20_pi.md#hardening-your-pi
+
+# *** TODOS / DECIDE / GIVE MANUAL INTRUCTIONS ******
+
+# ???
+# sudo raspi-config nonint do_ssh %d
+
+# Wait for network at boot?
+# sudo raspi-config nonint get_boot_wait
+# sudo raspi-config nonint do_boot_wait %d
+
+# automaticall detect and set time zone?
+# maybe do on in setup scripts
+