[Cgyracer]

Can't tell by the picture but is it possible through expansion the corner of the tire was touching your 3D chassis?  Or carefully check for interior rub.  It looks like rubbing another surface for sure.

Is there a very slight right turn on the straight causing the car to swing slightly to the left when you brake?  I guess it could be possible if the braid is slightly higher than the track surface but if the braid is lower or even with the surface I can't really see that?
Rob