You won't be aware of this, but BSAC sports diver teaches planned backgas deco - although while you're under training you can't actually get into deco because of the Ocean diver depth limitations, but you run all the scenarios including gas planning and time to stops. So in essence Sports diver does include some tech training (by the definition of other agencies), although it doesn't include gas switches (if I remember correctly)are you thinking of working your way to any technical levels ?