Qubd twoup z wobble fix, z rod stabilizer

This is a part I made to reduce the z wobble i witness when watching the z screw turn. I was able to see the screw moving left and right as it spun, and it affected my prints in a bad way. Designed around a brass flange bearing I bought from Home Depot that has an inside diameter matching the twoup z-screw. These are self lubricating and cost around 3 - 4 dollars. http://www.homedepot.com/p/Crown-Bolt-3-8-in-x-5-8-in-x-1-in-Bronze-Flange-Bearing-57738/203537359. The bearing holder is designed to