[Leo.G (Leo)]

It seems this is no longer that important since I found the 2 dual speed GSO ball track focusers I have for my 8" carbon RC screw straight on the Megrez tube (I always thought the RC had a larger collar) and I Also have an extra 4 inches of extensions whch probably will be needed because it's a much shorter focus system with the RC8 thing fitted.
I still want to tidy up the original Megrez focuser but if I buy a couple of more extension collars I can use it with the RC as a finder/guide scope (I do this with my 152mm refractor).


I've rebuilt the original with new bearings and some attention and it's reduced the slop considerably towards zero (never going to get zero with the weight I hang on it, I'll use that focuser for visual and heavier duty things for imaging). I also have a very nice WO focuser which I've designed an adapter so it will screw straight on with a longer central tube than the original or the RC focuser. I just have to find the aluminium to machine it up and remember how to dodecent threads on alloy on a lathe (my book will tell me but I don't have enough alloy to mess it up a few times). In all fairness I haven't really used a lathe in well over 20 years other than a few very small jobs in the past couple of years, no threading though.