4WD

 

OK, I got a bit frustrated with the lack of traction on rougher ground so I added a 4WD system. Basically I have added a second motor to drive the other set of rear wheels so now both sets of rear wheels are driven. I wish I could find a way to lock the diff's on each axel, then it would be true 4WD. As it is, it is a thousand times better than it was and now has full traction on rough and uneven surfaces. I might play around with the suspension spring rates, this would improve the traction even more.