Right got it all out, filler probe clear and air gushing through it, I've mostly had guns with buddy bottles but as the cylinder on this ultra is very small I would still seek some advice, Think I've heard before about slow fill adapters, So will this probe be ok to fill, Is it a case of very slowly opening the dive tank valve to fill the cylinder of the gun, I'd rather seek advice first than possibly over filling the gun resulting in damage or injury to myself, Thanks again,