I'm one of the early backers so I had some trouble with my banding on my Z axis earlier. As you all know, the guys over at BigBox have shipped new parts to everybody that had this problem. This included new Brass nuts, new smooth rods and also some new printed parts to change the way the rods were mounted. I've had these parts lying around for a few weeks now and finally got the time to install them. I quickly did a Ø30mm hollow cylinder to test. As you can see, most problems are gone. However at the top (starting from about 235mm) you can see some banding occurring. I'm not even sure it's banding, it's just, uneven. What do you guys think of this? Is this comparable to your BigBoxes? Should I do more tuning? I'm considering loosening and tightening again the Couplers.