I am trying to figure out if the vt3 can handle this scenario..... Two tanks, two transmitters set to self, one vt3 computer, and frequent switching back and forth as typically with side mount , maybe 50 bar at a time . Does the computer read both both transmitters all the time? Or do you need to switch tmt use each time you swap regs. My Lds told me you couldn't switch back again once you had changed it....not sure about that one. Short of testing underwater it is difficult to know. The manual isn't very clear , scenario two would be the vt3 reading one transmitter only, dive the second tank with an spg. How does the vt3 treat a situation when you are not breathing air from the tank with the transmitter, hope I am making some sense with this. Thanks for any suggestions.