Installing M8C as an alternative os based on the zynthianos

Hey I recently got the DIY Kit for the V5 and really enjoy this little piece of hardware. But since I got a teensy lying around i thought of running m8c as an alternative os for the zynthian making use of its buttons encoders in outs and screen to control the M8 Teensy via USB. I got M8c working perfectly by just disabling the zynthian os but im running in to a few problems

First of the screen is turned 180 degrees which i believe is normal bc the screen is mounted the “wrong” way

second thing i cant get working is the autostart of m8c because everytime i start the zynthian with my custom service file it just goes into the console and i need to log in

So if someone familiar with RPI related stuff and Zynthian Implementation i would be pleased if someone could give me a hint how to create a service file which autostarts m8c and turns the screen the right way

If you have some tips for making use of the i/o and buttons and how to implement them id like to hear about it

Thanks in advance:)

Are you talking about this thing?

Yeah i do my biggest struggle is really integrating the buttons encoders and ports of the zynthian