I bought this to go on my GSO RC. It won't fit.
So if someone wants one of the finest focuser upgrades for their scope, here it is. This cost me US$390 + $65 shipping. You can save the shipping cost and get a brand new AP focuser.
Price $450 Aussie, I'll pay the shipping inside Australia.
If you want some pics and specs go to
www.astro-physics.com under accessories/focusers etc/27FOC3E
This is a work of art as much as a functional focuser.
Cheers
Stuart