Hello there,i have been a diver for 25 odd years (bsac dive leader) with early 1500 dives. when my eldest son was 18 he went all the way to club instructor and then tried tek diving so i joined him and we just finished the tdi advanced nitrox and accelerated decom procedures.we now use twin 12 and the next step will be to do the tri mix courses.we live and dive nearly every week ends in mauritius an island in the indian ocean and sometimes dive on holidays.