SimonK

My understanding is that the system has three analogue inputs, these have been arranged into two versions. One with three cell inputs for the KISS etc. and one for the classic with the traditional 4th cell and two high pressure sensors. If you look a the pictures the cable to the 4th cell ends in the cap for a Delta P Y piece adaptor.

If you use the classic version you get a VR3 with 4th cell, plus dil and O2 pressure monitoring, plus a HUD.

Of course you could get the 3 cell version and connect it in parallel to the three cells on a classic in the same way a Shearwater HUD connects

Simon

PS. Nice article Stuart, see your still not convinced about Armadillo style side mounts.