Only trauma I'm having is trying to get the 2l Evo bottles (and our brand new 5&7l Luxfer Al stagies) approved for use in NZ, as there's none over here yet. The tortuous process involves no end of paperchasing, 3rd party inspection stamps and bursting discs for the larger cylinders - looks like it might be a no-go for the Luxfers as no third party stamps, so would appreciate advice from any NZ residents out there.