FLSun_I3 X Axis Upgrade belt Tensioner Upgrade

I modded this bit after finding that the tensioner tended to rock or wobble. I added material to prevent it from rocking, forcing it to slide in that rear channel instead. I've yet to install mine, so this is a test.
Likely it would require that you attach the belt to this piece first, since the spacer removes available space underneath (compared to the original) to get the belt linked up and secured.