Bloody hell, sounds proper ropey! Are you not able to keep your bottles out of direct sunlight between games?hmm i woulda thought there woulda been more problems when using co2 with the hot weather and watnot. there are risks with both but co2 bottles in the heat arnt good. working at my local site sunday we had about 10 guns go down in a big venting way with 3 blowing their burst discs and 1 blowing its expansion chamber/front grip clean off of its thread :X luckily i wasnt holding it at the time the site manager was muhahaha !