Mendel geared extruder idler-holder v1

Summary This is a part of Adrian's Geared extruder. Original part is a bit weak, I noticed after around 80 hours its worn out.. So i made this part a bit stronger/bigger (where possible) and the hole is not through now. The length of the 4mm inlay-rod can also be longer: 38mm and it goes all the way untill under bolts now, so the reprap parts doesnt get all the forces, but the load quickly transmits to the bolts.. (We are also: www.mendel-parts.com)