Tankbot kit question...

[Wolthuis]

I purchased the tankbot kit to do a small robotics project. I noticed when I put it together that the tracks were rather tight. Now that I have the servos working I'm finding that the tracks are bending the wheelhubs just enough to allow the tracks to work themselves off as the tankbot moves.

I've tried tightening the wheels which helped somewhat but still after just a minute or so of movement, the tracks work themselves off the wheels.

Anyone else having this problem? Any suggestions?

Thanks

William