I used since many years a 6wd dagu and APM 2.5 2.6 with no problem, but I'd like to upgrade with a pixhawk.Alas, I've a big problem it's impossible to move forward or back, no problem to turn left or right. I'd test with a navio+ and it's the same problem.
I'd return with APM and no problem. I used ardurover 3.1.0 and sabertooth 2x25.
I'd test many possibility with sabertooth's switch and skid_steer_out 1 but it refuse to move back or forward.
Thanks for your help.