Flash-sdcard.sh workaround for Robin nano v3

Basic Information:

Printer Model: ZeroG Mercury One, Sapphire Pro
MCU / Printerboard: MKS Robin Nano V3
klippy.log

Describe your issue:

Hello,

i tried to do an mcu update with flash-sdcard.sh by using the existing config for the robin_v3 which is referenced to the monster8. The flash doesn’t work as described in the discord (the following 8 posts)
Is it possible, to integrate this board definition, as i described in discord?

greetz, Ralf