It’s in the details.

The bold holding the rear shock was mounted in such a way that it could touch the tire. (I know this can happen when the  panhard bar comes lose during a run, which happened with the Vega). Better turn the bold around so the nut is on the outside. We also found out that the spacers to mount the shocks are missing. We replaced the nuts of the fornt supensieon by self locking nuts.