V2.1

After trying to build it I found out my maths was wrong (unsurprisingly). Wheel arches were preventing the wheels moving freely.

I also found that the top parts of the motor mounts were snapping, glad I added the zip tie holes now.... if they snap off during a build it works fine without them. I'll try and add pictures to show where the breaks are.

Updated the files to reflect changes which should fix this. Also added a mount for the switch.