Microextruder for geared stepper

This is an idea I've been working on in my head for several months and dozens of revisions. I finally decided to get something into the computer and post it, and gave myself 24 hours to do it. This is a very small extruder block (it should be smaller than Brut) that has a spring-tensioned bearing idler like Wade's and a single tightening screw like the Mk5 Plastruder. It is designed to be used with a planetary gear stepper like this one, and Mk5 drive gear with the hole drilled out to 8mm to fit