MendelMax 2 MM2 JD Z Screw Thrust Bearing Holder

This is a thrust bearing holder I made to improve the quality of my MendelMax 2 parts. I think the lack of a bearing to hold the Z screws in place at the bottom. It seemed like hanging the Z screws by spring-like helical couplers wasn't helping, so I put them in a very slight compression with the help of this part.

This part requires two 688 bearings. I am misusing the term "thrust bearing", but given the such light forces involved, a regular ball bearing is more than adequate.

An isolator