add Poseidon to that list Jim.
Hey, we are right when we say that following the DST service schedule for Apeks will work for the D1, and same with the DS4/D2, problem is like what you said, most of those guys shouldn't be inside of a regulator in the first place.... At least the D3 has a replacement crown which is what they usually fubar anyway. Hell, that's how most of us serviced them until the course came out and most of us that are trained Apeks techs never bothered with the course and haven't had problems with them.