Anet A8 X-Axis tensioner designed not to interfere with any of the other stock components.
requires an additional M3x6 Screw an M3x25, and an M3 nut pushed into the bottom of the bigger part.
Part V1A-Adjustable X belt_attach and adjust.STL thickens the wall on the bottom of the small part for those having issues printing.
brim should be turned on. White parts shown on the printer were done with these settings. Red parts were not and although they would have worked I wasn't happy with them, but they showed up better in the pictures.