Many thanks guys for all the tips. Just got off the phone to my mentor and CNC guru John S and has given me some excellent tips and a way to get X axis bearings aligned perfectly which I didn't know how to get around and his idea is almost foolproof and will guarantee they sit nice and snug against the rails without splaying or binding he is the man!!!!!!!!!!!!! I am hopefully going to get John to come round when he has a few spare minutes and we can go from there. Guys if you are ever stuck on anything CNC John will have certainly done it or will give some sound solid advice on how to get over a hurdle the man is a genius. Laz.