How was it for you with the old center? This one is the same dimensions other than I opened up the tension slots an extra 1.5mm, so really you should be able to tighten it up way more then the last one. You have me nervous, I am going to take this one apart to check for wear and I have a second set ready to build and make the instructions with.
I really do appreciate the input. I am in a bubble here and you beta testers really help more than you probably know. I much rather fix issues here than have to release updated parts on thingiverse, that is a clusterfu$k to deal with at that point.