so banning custom cylinders may seem like an easy option, what about the people who drop there rapids and mabee damage there buddy bottles, theres no legislation they get it tested, even if there is they may not know that.so then youl feel uneasy about standing next to anyone with a gun atall. just incase?
a few people i know who make quick fills and the like have paid too have them testedat design stage, and realistically id pay an extra tenner when buying to have it tested and certified. not hard really is it,
there will always be people who are crap at making things and accidents happen but by there very nature most are accidents,