E3D (Gates) 20T Idler compatible mount for Y-Axis on Prusa MK2.5 with Bear Upgrade 2.0

This is a remix of the Y-axis idler mount for a Bear 2.0 upgraded Prusa MK2.5 to make it compatible with the Gates idlers sold by E3D. (_Bear Upgrade 2.1 includes an official (optional) part for these upgraded idlers._)

I based my modification off of the changes *motocoder* made to his remix of the MK3 version to accommodate the same idlers. You'll need some 5mm (4.5mm might be better) rod to use as an axle due to the larger bore on these idlers. I had some 5mm stainless steel dowel pins