Make sure to line up the wheels correctly! Oct 23, 2010 15:10:01 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by juancferrer on Oct 23, 2010 15:10:01 GMT -5 At first, I just threw them together and ran it, and this is what happened. I thought it was broken.Then i noticed the 2 IR sensors by each wheel.Big difference!