The Crayford-style 2:1 focusser on my SW BD100 refractor seems to be a little under-tensioned, as it doesn't like to move without some push-assistance when the scope is vertical. The tube seems too free and not real smooth. It's got a 1.25 flip mirror with 2" 28mm EP and EOS 1000d attached. I don't think this weight is excessive, but I may be wrong
Has anyone got any useful info on removing the focusser, cleaning and adjusting it? There is only one focus-lock thumbscrew on the bottom, plus half a dozen flush hex-key screws, which are obviously the ones I'm interested in, but would like to hear any prior-knowledge that's around before I start twisting and turning them
