Cheers mate.. I just took a look through the scope with a cheshire eye piece and the secondary was off by quite a bit.. It doesn't have a center spot, that sure would be nice...
I'll look into the idea of centre spotting the secondary at a later date, for now, the cheshire made a big difference I now have all the rings looking down the scope concentric, they were quite a way out, somewhere in the vicinity of the 25" you mentioned..

I should have it out again this weekend, I'll point it at a star and see what I can do.. (provided the conditions are suitable...)
Cheers mate. I appreciate your input...
Ps. send me the cash and I'll buy an RCOS too