About this 3D model
Includes a beefed up Y-axis motor clamp, and a heavily reinforced Y-axis idler with adjustment. This a remix of MattyVee's idler from https://www.thingiverse.com/thing:2786671 (though I'm not sure there are any original parts left) There's also a 10mm wide variant for wider idlers. Uses a pair of 40mm bolts for the hinge and idler. Other than that, similar to Matty Vee's. Print the ‘Top’, and a suitable ‘Base’ (10mm for wider idlers), as well as ‘Washers’ if using a twin bearing idler. The washers can be used to stop the side of the idler rubbing on the plastic.