support spacer nema 23

Upgrading on the spacer supports nema 23 of the cnc revolution 2 project developed by the channel activity maker, this project aims to facilitate the placement of the gt2 belts in the machine. It can be printed or even unsinished in a cnc, in the case of machining, will be in two pieces of 15mm. In the project we use the HDPE material, however it can be made in MDF. I hope it's useful.