Great design! I created my own approach to solving the crappy new collet that ships with the v2, but this is a much, much better solution.

Had some issues with getting the bearing out of the stock arm, and then realized I didn't have to swap it out. Have the replacement arm printed, but right now it's working flawlessly as-is, so all you really need to replace the junk new design is the base plate.

Monoprice Select Mini

0.0875mm

25% cubic

Easy print, followed the instructions and flipped the cover piece (perfect fit on that, by the way) and no problems.