Projector Elevation Adjustment Disks

Portable computer projectors have an adjustable foot (screw) for elevation. They're always either not high enough, or broken, or both. This leads to a scramble to find some way of tilting up the projector. A stack of these disks does an excellent job. They're small, so they'll fit into the projector's carrying case, they interlock, so that the ones in the middle won't slip out, and the top one will have an indentation for the existing projector foot to fit into.

I've provided 3 different