[Luce]

The caster affects the needed elevation of the rack. If you're running more positive caster than the stock M2 alignment, you may need to raise the rack. With a little geometry you can figure out how much. I think you could easily elongate the 2 rack mounting holes and fix it that way, or reduce the caster. The positive caster gives more restorative force to center the wheel at speed, which isn't a bad thing in this short wheel based car. I think I'm only running 2 deg and have no noticeable bump steer.