Yes i did under stand a bit of that and a bit of gobleydygook, lol , like i said new to pcp, kit connected to bottle ok air come out of line ok , connect line to gun turn on gauge from bottle air comes out gauge on bottle goes up, gun gauge stay same then pop, and i stopped didnt what to blow seals ? that the line pressurising ? then fill gun up ? what if gun has 100 bar in and i fill 190 on bottle gauge that blow up gun got 290 in gun only take 200 ish, thanks very much for help and kind offer of call that may help, cheers,