http://www.mcmaster.com/ and look-up KNOBS.....they have a lot of them in metric and S A E..............i have bought a lot of them for projects and use on other equipment.................. Clear, dark skies and large mirrors..................gary
-------------------- "Life is not measured by the number of breaths we take but by the moments that take our breath away."
10in Zhumell-$15/ push to circles-flocked tube
8in-c8-on a Meade GoTo EQ mount with a cg-5 Tripod
5in Meade with goto...
2in Gilbert reflector (1955 or so)
7x35 binos
Orion 100mm X 600mm Achromatic Refractor
Sac8-2 ccd camera