Windup Guy,
The trailing wheels are fine. When tested on a track, it was the drive wheels that couldn't hold in place at times. Once I put some pressure to help straighten that axel, it seemed to work better. I just thought I'd ask to see if anyone has a better suggestion to straighten the axel.
Also, it seems like the "molding" of the front "left" wheel is a bit wobbly. That I cant do much about though.... Ah well.