Hello ipeel8. I’m in Ontario too, near London. Are you nearby? I’m also using a pi/f9p for base and also using all in one ampseal boards, but all with micro F9P instead of standard F9P.
Can you clarify what you mean by 3 raise commands, 3 lower commands? Is your tractor pulling/pushing 3 implements and you need each implement to raise/lower individually?
Here are lists of PCBs:
https://github.com/farmerbriantee/AgOpenGPS_Boards
You’ll want to decide how you are going to distribute the control system. Do you want to mount section control modules on the tractor or do you want to mount them on the implement? Either setup can make sense. If you want to do both section control as well as rate control then I think it makes sense to combine those onto a single PCB and mount it on the implement. Have a machine control PCB mounted on the tractor in order to control the raise/lower.
Personally this is my first year building a system. I’m getting tractors steering for a season before I expand to raise/lower/section/rate. I’m already overwhelmed by just getting them steering.