My coworker recently build a keeb.io Iris keyboard and he wanted some standoff feet. We decided to laser-cut some plexi-glass for it but the local fablab only has 3mm in stock so we needed 5 layers.
The original design from keeb.io's github is designed in such a way, to laser-cut multiple layers would be a huge waste of material.
The 2nd image has the comparison of the original design and my remix. This design can be cut in 3mm plexi, 10 copies of each piece (5 for each side) on a piece of plexi only the size of a piece of A4 paper.
Since I also pictured the transparent backside, which I didn't design at all I just put it along with the other files