Cupcake Z-Stage F-01

This is a small part that you use to fix the Z-Stage on the four threaded rods. Cupcake CNC developers only included 4 of them, fixing the Z-Stage from the top. However, it is useful to fix it also from the bottom to prevent it 'jumping off' the nuts. I found the DXF on thingiverse, however for some reason I failed to convert it to STL miserably. :)

So I created this part myself using a real-world ruler and openScad (openScad is a damn cool piece of software that uses simple programming lang