Adimlabs replacement extruder

A replacement extruder for adimlabs gantry i3, with a beefed up arm, as the original does crack sometimes. This uses the stock hardware, bearing, and spring, and re-uses the original black metal mounting plates (lower mount not shown). Please note that the tolerances on this are VERY tight, so some parts may need filing/hand finishing to operate smoothly.

Pics shown are just a test fit, this is a work in progress, but should be functional as is.