Peter, the AirTurn people also don’t know why my iPad/their Digit II and BT-106 don’t work together in the production release of Stage Traxx.
So I installed the beta 3.0 and it works great with the BT-106! That’s the way forward. I may have to purchase a new smaller handheld AirTurn unit but that’s OK.
Let’s call this “resolved” - thank you for your guidance and genius!