Thanks for all your reply's I'm going for the hills all your input has helped a lot thanks again
keep your eye out for a secondhand one I paid £80 for my mk2 in mint condition.
I had a Webley branded one. It looked very similar to the FX 3 Stage jobby (and probably was).
It worked fine and easily pumped my S410 and HW100 up.
I went for the hills mk4 pump and I'm very happy with it so thanks for all your great advice s