X5SA Pro pulley supports for toothed idlers. Includes support at the top of each bolt so that the idlers can run freely. It is designed to work with idlers ~8.6mm across.

Print 2 x 2.6mm spacers and 4 x 1.6mm spacers. Print a normal and mirrored Y-axis endstop. From the top install a 2.6m spacer, idler, 1.6mm spacer, idler, and a 1.6mm spacer using the M5 bolt and nyloc nut.

The pulleys on the blocks can be printed without supports. Just print them with the back side downwards.

Update: added an option for running 10mm wide bearings.