Ok well with that all being said. I have OW, AOW and nitrox certs from NASE and getting ready to take rescue diver course here in about a month. Now my thing is that my instructor is cross trained in all but SSI. To me he is great we go over what is needed for NASE then after the skills are done I personally talk with him about the other agencies and their differences. My reason for doing this is I want to be an instructor but once I get there I want to do cross training to all those listed. I know this is a little off topic but its the closes thing I have found to it. So to all the instructors out the should I stay the course with one agency or should I flip to one of the others?