Prusa i3 Zip X-axis

Prusa i3 X-axis pieces - motor mount and idler with tensioner. I've found that the zip-tie mounting is every bit as strong as the standard through-hole but is much more forgiving of imperfections of the inner surface and much less likely to delaminate layers.

Tensioner is designed for two MF104ZZ bearings mounted on a 25mm M4 screw & nut.