Bear X End Mount for E3D 20T Idler

E3D is selling very high quality Gates idlers. However, the idlers are wider and have a different inner diameter than the commonly available idlers used on Prusa printers. User tetra3dprint had a great idea to modify the Bear X-axis idler mount to allow use of one of these E3D/Gates 20T idlers. His design uses an adapter to allow those currently using the smaller idlers to re-use whatever they are using for the idler axle (typically, a dowel pin).

My design does away with the adapter. You wo