I just wanted to thank you for this, so much. My first Celestron 11” had a problem when installing the motorized focuser that shredded the gasket under the bearing. I reluctantly sent it back for warranty service. I received my second one (which I had to wait 2.5 months for) and attempted to install the focuser and had the binding problem. I investigated the bearing and saw that it appeared to be slightly higher on one side, contacted support, and was about to send another one back out AGAIN. That would make 7/9 Celestron products that required RMA or support. Their quality control is just poor, and they really don’t care. Anyway, you saved me probably two months of waiting. I appreciate it very much. Now I have to RMA a brand new CGX, CGEM II and a Sky Portal. :/