[Bellbuoy (Peter)]

Trevor
You might care to check out my post #19 under the thread "CCD Imaging Advice" (sorry, don't know how to make a link on this system). There are some photos of my setup for prime focus and EP projection with a webcam on a small Newt.
I think the idea is to keep the camera close to the EP and move the combination away from the prime focus point (in or out). Don't try to focus the EP for visual first. It's like the camera is wearing the EP as a corrective lens. You don't need to focus a pair of glasses to see through them. I did a Google search on eyepiece projection and came up with a diagram (attached) which made things clearer (no pun intended).
In my case I often remove the eyepiece holder and screw the camera adapter directly onto the focuser. This is a bit awkward because I have to turn the camera as well. This gives me more range of focus outside the prime focus point.