Thanks for all the info thus far mate.
I made an adapter (home-made) to directly couple the camera to the diagonal on the refractor. 10 sec delay is more than enough to allow for vibration/wobble etc.. I can't really use the big reflector for this project...the drives not good enough (yet)
All my images on here are 1 image only. Lately I've been collimating the refractor with the diagonal in place. I get better results this way, despite the general consensus that it should be done without the diagonal in place.
I'll give U a hoy when I've got a heap of DECENT pics!