Thanks.
I use a 10 inch F5.6 Newtonian on a "Sampson" German equatorial mount ( scope and mount made by Astro Optical Supplies in Sydney). My rig is nearly 20 years old, was bought for Halleys Comet. It now has an off axis guider assembly from Aeroquest Machining
This is my rig now.
http://www.users.on.net/~josiah/focuser/IMG_9932.jpg