Direct Drive Extruder - Idler Remix

While I love the direct drive hinged extruder from ffleurey, I found the idler kept breaking. The printed stud simply wasn't strong enough for the tensions I was using. This part is my attempt to fix my problems.

The primary difference here is the use of an 10mm M5 screw to hold the bearing. To achieve this this idler is now double sided and the body is slightly differently shaped to give the screw some support in tension (although almost all pressure will be back into the main body of the