Quote:
Originally Posted by Notanoctopus
I've had a look - those screws (other than the locking screw) are in very tight, and I am not sure if I can unscrew them without threading them.
This does seem to point towards this being the problem - if they are all in too tight, then it makes sense it is a bit harder to turn the wheels than it should.
I'm a bit wary of putting WD40 on it, I have heard it can get into the optics eventually if it gets into the focuser.
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You should be able to put a bit of WD40 on them without splashing it everywhere - maybe a bit on a cotton bud or something. Even if you were a bit heavy handed, I don't think you'd put enough on to ever have a chance of getting near your eyepieces, given that there's a fair bit of gear between those screws and the eyepiece, plus they're at the bottom of the assembly.