Tronxy/3DCStar P802 X-Axis Belt Tensioner

The Tronxy P802M X-Axis end-carriage is not a 'through' design, and traditional Anet A8 belt-tensioners, which rely on looping the belt past the end of the right end-carriage, will not work on it.

This compact design simply snaps on to the X-axis rail by the right carriage which:
* adds more tension to your x-axis belt (e.g. when it stretches due to aging), and
* has the added benefit of making the x-axis belt loop more run more 'parallel' to each other (the Tronxy uses a much larger beari