I hope someone has a solution to this problem. I bought a beautiful older Tak FC100 several weeks ago and wasn't terribly happy with the stiff single speed focuser. So I ordered the Starlight Instruments 2.7" micro pinion focuser. It's really beautifully made but I'm having an annoying issue. When I adjust focus, there is significant image shift. I've tried tightening it down with the two Philips screws and I'm pretty sure the leveling screws are adjusted properly. I don't recall any image shift was using the original focuser but I only tried it out once before installing the micro pinion. Any thoughts on how I can eliminate the image shift? I'd really like to be able to continue using it because having the fine focus is such an improvement.