GT2 belt tensioner thingy

This is an addition on the legs I designed. The "red" tensioner part has a few small holes in it, to easily remove the belt from it. if your fillament is calibrated, the belt should fit perfectly.

The tensioner is designed to be fitted with an M3 nut and bolt.
(the last screenshot shows the M3 +0.2mm)

UPDATE: I have given the green parts an extra 0.2mm, because it doesn't have to be a tight fit. I sanded down the parts to make them fit, you won't have to.