Ahhh, but it looks like you're having fun Peter!
Probably nothing in common, but I had frustrating issues with the focuser on my zenithstar 80 slipping, until I took the time to read up on what the various screws/allen keys did. Turned out I only need to tension one allen key to keep a smooth feel but much greater lifting capacity. Expect you're already up on the mechanics of your focuser though.
Sure is a bit of work to suck light down through these "straw-like" refractors?!
