Not sure if the course covered this, but, you are the only one in charge of your safety, or should be. Just remember, ALWAYS analyze your own gas, NEVER take anyones word of the mix/mod, and by doing this, the life you may save is YOUR OWN!!! Diving EAN is an added risk, (not that I'm apposed too the risk, I also dive TRI) but, by analyzing the mix yourself, you cut the risk factor. Also, buy an analyzer of your own. Of coarse the LDS's analyzer reads the same, they may have mixed the gas with the same analyzer. Most have seperate analyzers, but why risk it??
Joe