While pulling and cleaning the glass bed, I felt a lot of play in the aluminum bed. It turns out one of the bearings is so shot that it rotates easily putting stress on the other three. It will lift and rotate by several mm that you can see at the bearing itself. Huge gap around the rail. I have only owned my Taz 4 for about four months and really don’t print more five attempts a week. Really disappointed.
If I am going to have to pull it and replace, I guess its time to replace them with ball linear bearings. Time to dig for that information.
Has anyone gone to a larger diameter rails? 12mm? 14mm? 16mm?