P3Steel - Y-axis idler Ø5mm bearings & 20 theeth GT2 Pulley

I was in need to replace my weared off 3D-printed idler pulleys, the ones i got for replacement have Ø5mm bearings and are a bit wide for Toolson's idler so I've remixed it.

First of all, I've widened the pulley receptacle to accomodate ≈10mm wide pulleys.

I've made recesses (2mm deep) for the nut and screw allowing the use of a M5 x 20mm screw.

Also, I've aded a connection from the base to the support structures in the back to improve their adhession to the bed.

If you think it dese