Quote:
Originally Posted by Ian Robinson
Neither - just move the mirror cell up the tube and closer to the focusor and invest in a 1-2" long extension tube for when you want use to eyepieces that need the extra backfocus.
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Cut the tube, cut the tube, cut the tube!!!
I agree with Ian, Brendan and everyone else from now until the end of time who will give the same advice
I've been through this and you will not regret it.
Forget the focuser method, just cut the tube using the terrific article by Alchemy.
And then go and buy an extention tube to bring your eyepiecees into focus.
And there is absolutely nothing wrong with using silicone to adhere the secondary mirror to that GSO holder. I did this for my first 6" newtonian I build 25 years ago, and seriously, it never moved 1 millimetre in 15 years!