This is a camera slider based around a 2020 aluminum profile (B- or V-Slot type). It keeps the timing belt and the endstop wiring iide the rail for a clean setup. It uses six 608zz bearings to form a double three-point grip around the rail for zero play. VEION HISTORY 2019-06-22 Update 1 New veio for the endcaps: for idle 16T M3 or 20T M5. 20T M5 should fix the belt guide issues because 20T idle usually have larger side guides. Suitable also if you have a stock of 20T M5 and don't want to buy 16T M3 just for this project. Note for 20T: greater distance of belt to inner surface of 2020 profile may make the belt more susceptible to fluttering 2019-06-22 Initial release endcaps suitable for 16T M3 idle only belt guide issue with plain pinion moto. This does not affect typical NEMA17 moto with plain axles because these need a separate pinion anyway, and those usually come with belt guides.