Printable idler that fits on the end of a 2020 v-rail.
Fits on 2040 v-rail too, if the belt goes through the middle section.
It has "legs" that fit into the t-nut slots, and can be fastened with a M5x10mm screw to the end of the extrution.
Printed with the "legs" standing on the bed, with line-support only touching the bed.
2 pc. - 3mm shims (see attached STL, for each side of the bearing)
1 pc. - 625zz bearing
1 pc. - M5x25mm screw (or M5x35mm)
1 pc. - M5x10mm screw (need to tap/thread the end hole in the 2020 for this)
1 pc. - M5 nut
Pictured with the stock Reach 3D endstop arm and M3 screw.
All the hardware in the list is the same as the stock idler uses, so just swap it over.
The M5x10mm screw you can find in the spare parts bag.