Thanks for the advice, yes it is supposed to be filled via a buddy bottle but I had an adapter with the gun, was told by the owner to fill from dive tank but very slow, What pressure should I fill to or should I wait until the air comes out of the valve, Would a rapid buddy bottle work, Only got the 400cc buddy bottles here, I sold 2 of my rapids and I have quite a few 400cc bottles here I could use if they would work , Thanks for your help.