That’s awesome, sounds like we made identical configurations! For the original roller, I ended up having to widen the part with the spoke 1mm so that my bearings would roll, but it seemed like such a waste to use 4 per box. It wasn’t until a few weeks later I came across cmyk’s solution. I really like it except it is a bit difficult to get a nut to interface with a screw. I think I have the knack down now. Really, I could almost see not using a screw and nut with it since it fits together so tightly, but if I didn’t do it, it would probably come apart at the worst time during a print.