Something else I forgot to mention is impact testing by these manufacturers. I am sure we all have heard about that certain electric car in the western hemisphere that is having fire issues with their fuel cells, (Metal Hydride or Nickel-one of the two). T-bone accidents with forktips impaling other units? I've seen a few of those in my day, the only difference is it was never a 10 gallon tank, pressurized with a highly explosive liquid/gas at 5000psi. In the worst case scenario, you would not have to worry about sending the operators-or anyone within a 100 yard radius to the clinic for a drug test!! :)