Front trunk (bonnet) lid on my Model 3 doesn't sit level. Adjusting the screw-in rubber fittings only got me so far.

This sits on the car trim and can be stacked to increase thickness (raised pins with inverse underneath to stop shifting), allowing the screw-in rubber fittings a higher platform to contact raising that side of the front trunk (bonnet) lid.

Automotive tape for bottom, superglue between layers.

Printer is actually a Prusa Mini+