Also, unless it uses eccentric-ring collimation, which, if it is older it does, it has a screw under the vinyl just in front of the backplate and on the inside near the lower axle bracket.
Welcome!
Bill
-------------------- William J. Cook, Chief Opticalman, USNR-Ret.
Founding Editor, Amateur Telescope Making Journal
20-year vet. of Captain's Nautical Supplies, Optics Dept. Mgr.
Optics Machanic, WG11-3306, Ft. Lewis, Tacoma,WA
Yata, Yata, Yata . . .