In 2002 I was given at no-cost and no-effort a handful of SDI and TDI Instructor cards to match what my then-current PADI Instructor credentials were. This was a
Bret Gilliam special deal when he was SDI./TDI and was trying to build his instructor corps; my cost was paying for SDI/TDI dues for a year. That was the extent of my "cross-over" and I taught various SDI and TDI courses for a number of years based on those cards. I wonder if Stewart got a similar deal.....did he have any PADI Instructor cards? Which would NOT have included the Draeger SCR, by the way, or any other tech credentials, since PADI did not have nay tech courses at that time.