Thanks Geoff, I will give that a try, and Paul the grub screw is no where near the focuser, but on top of the focuser barrel near the connection point of the focuser and the main tube.
This is why i fiddled with it, because it really dose nothing, I thought it may have been a tightning screw of something, so as i started to screw it down gently to see what it did, it disappeared inside the tube.
Leon
