Carpet Riser Foot (for Computers, UPSs, etc.)

This is a sturdy riser foot meant to keep things elevated off of carpet. I use them for keeping a computer and UPS off the ground for air flow, and have also used them for stacking boxes off the ground in my garage. The foot itself is pretty strong.. I believe a single foot printed in PLA can handle over 100 pounds (YMMV.. I made the things a while ago and don't recall the exact point of failure.. Its quite a bit though :P)I suggest printing at 0.3mm layer height with at least 3 walls, 4 top layers, 3 bottom layers, random seams, and ironing enabled.These are designed in a way that saves material and requires NO infill. The feet are hollow with the exception of some small columns placed inside the void. The columns help to support the top layers in printing, help (to a lesser degree) distribute load on the foot, and finally serve as a warning that the load is starting to deform the foot by crumbling inside the cavity. Once the supports crumble they will rattle around inside the voi