Given reasonable volume, it’s hard to believe such systems need to cost $90k, if that’s correct for an AS350/H125. Surely there is something that can be a lot safer than the ? say $9k plastic tank than having to spend $90k. Are the standards too demanding? I wonder how much of the price is for product liability insurance cover? I guess if a fire occurs with a “crash resistant” fuel cell a big claim is likely to follow.