Thanks all for the advice, won't be cutting struts or any other major work though. I did contact Andrews and they gave me a link to the same problem that appeared in a 2013 IceInSpace forum. The guys replaced the primary mirror adjusting bolts and screws with slightly longer ones and this fixed the problem.
My scope is a few years old, just getting back into it and appreciate you giving the time to help, it is good to understand more how the focusing works.Sorry if I caused any friction.
It is a bit slack for GSO though, we should not even be talking about this problem. Here is the link if you are interested
http://www.iceinspace.com.au/forum/showthread.php?t=114061
Once again guys, thanks for the help.