First test and this is the first desgin:

Thanks Gael. It fits very good so far. Too bad my printer isn't working right for more than a week now but I'm trying to have it ready to roll latest by the end of this year. Size will be 52cm wide, 64cm long and height 24cm. Using 2 window lifter motors on the rear side. The 2 front panels can be changed to run 4 motors. Using IBT-2 H-bridge 43A which can easy handle 2 motors.

Rear left, inside

Rear left, outside

Python for the window lifter motor:

arduino = Runtime.createAndStart("arduino", "Arduino")
arduino.connect(testPort)
m1 = Runtime.createAndStart("m1","Motor")
arduino.motorAttach("m1", 5, 6)
m1.stop()
m2 = Runtime.createAndStart("m2","Motor")
arduino.motorAttach("m2", 7, 8)
m2.stop()