diff --git a/alternative.platforms/README.md b/alternative.platforms/README.md
index c90f7974c..ed4c1a38b 100644
--- a/alternative.platforms/README.md
+++ b/alternative.platforms/README.md
@@ -18,23 +18,25 @@ Specifications of the tested hardware: [hw_comparison.md](hw_comparison.md)
 All testers are welcome. Open an issue for your specific board to collaborate and share your experience.
 
 ---
-## Armbian Stretch
+## Armbian Buster
 Many SBC-s are supported:
 https://www.armbian.com/download/
 
+To verify the downloaded image follow: https://docs.armbian.com/User-Guide_Getting-Started/#how-to-check-download-authenticity
+
 Tested on:
-* Odroid XU4 with the Armbian Stretch image from https://www.armbian.com/odroid-xu4/
+* Odroid XU4 / HC1 / HC2 with the Armbian Buster image from https://www.armbian.com/odroid-xu4/
 
 
-Burn the image to the SDCard with [Etcher](https://www.balena.io/etcher/).
+Burn the image to the SDcard with [Etcher](https://www.balena.io/etcher/).
 
-Assemble and boot.
+Assemble and boot.  
 
 `ssh root@192.168.x.x`
 
 password: 1234
 
-Follow the instructions in the terminal.
+Follow the instructions in the terminal. Set the new password to `raspiblitz` and name the new user `admin` to keep in line with the rest of the setup.
 
 Continue with building the SDcard: https://github.com/rootzoll/raspiblitz#build-the-sd-card-image
 
@@ -90,5 +92,8 @@ The HDMI screen tested: https://www.aliexpress.com/item/3-5-inch-LCD-HDMI-USB-To
 Detailed instructions for the RaspiBlitz-on-DietPi: [alternative.platforms/dietpi/README.md](/alternative.platforms/dietpi/README.md)
 
 ---
+For the process to build a custom SDcard image release see:
+https://github.com/rootzoll/raspiblitz/blob/master/FAQ.md#what-is-the-process-of-creating-a-new-sd-card-image-release
+
 Extras for advanced users and powerful hardware:
 https://github.com/openoms/bitcoin-tutorials/
\ No newline at end of file
diff --git a/alternative.platforms/hw_comparison.md b/alternative.platforms/hw_comparison.md
index cee367e38..a4f9f4219 100644
--- a/alternative.platforms/hw_comparison.md
+++ b/alternative.platforms/hw_comparison.md
@@ -20,6 +20,18 @@ https://dietpi.com/survey/#benchmark
 * 5V/2.5A DC power input
 * Power-over-Ethernet (PoE) support (requires separate PoE HAT)
 
+### Raspberry Pi 4
+
+    SoC: Broadcom BCM2711B0 quad-core A72 (ARMv8-A) 64-bit @ 1.5GHz
+    GPU: Broadcom VideoCore VI
+    Networking: 2.4 GHz and 5 GHz 802.11b/g/n/ac wireless LAN
+    RAM: 1GB, 2GB, or 4GB LPDDR4 SDRAM
+    Bluetooth: Bluetooth 5.0, Bluetooth Low Energy (BLE)
+    GPIO: 40-pin GPIO header, populated
+    Storage: microSD
+    Ports: 2 × micro-HDMI 2.0, 3.5 mm analogue audio-video jack, 2 × USB 2.0, 2 × USB 3.0, Gigabit Ethernet, Camera Serial Interface (CSI), Display Serial Interface (DSI)
+    Dimensions: 88 mm × 58 mm × 19.5 mm, 46 g
+
 ### Odroid HC1
 
 * Samsung Exynos5422 Octa core CPU 4x Cortex-A15 2Ghz and 4x Cortex-A7 1.5GHz
@@ -41,13 +53,3 @@ https://dietpi.com/survey/#benchmark
 * Network Ethernet RJ-45
 * Input Power 5V
 
-### Rock64
-
-ROCK64 is a credit card size 4K60P HDR Single Board Computer powered by 
-
-* Rockchip RK3328 Quad-Core ARM Cortex A53 64-Bit CPU
-* 1 - 4GB 1600MHz LPDDR3 RAM
-* eMMC module socket
-* MicroSD Card slot
-* Pi-2 Bus
-* Pi-P5+ Bus