Helios Heatbed clips

I got tired of having to use a tool everytime I needed to level my print bed, so I designed these clips to capture the M3 screws and used the Knurled surface library V2 (http://www.thingiverse.com/thing:32122) to make thumb wheels to capture the M3 nut.

This is designed for the Helios heatbed and is not designed to capture the glass plate (mine is 215x220mm).