Hi
What I have done is as follows:
I have put a 2L 200Bar cylinder for O2 in place of the supplied Russian O2 cylinder & valve.
I have a KISS valve that will supply O2 to the counterlung
Then I have taken 2 x 3L 200Bar Aluminium cylinders and fixed them to the chassis (offboard) with G-Clamps. The cylinders basically sit on the outside of the IDA-71 and looks almost like the rocket man

The idea is to have the one 3L cylinder with diluent (offboard), and the other 3L cylinder as suit inflation / Wing inflation and 1st bailout (also offboard)
(A regulator coupled to the suit inflation cylinder will be bungeed around my neck)
I will then be able to run either one or two scrubbers with no problem or conversion at all.
I plan to make a dummy scrubber from PVC piping to act as a "place keeper" for the removed scrubber, as i opted not to remove al the guts in the IDA, but only the "guts" where it affected the O2 cylinder. It looks great and works very well too, still keeping some of the original IDA-71 "flavour"
My idea is to use Nitrox 32-50 depending on my maximum depth, as suit inflation. This will then double as a convenient..I call it a primary bailout, (for sanity breaths ) before switching to the main bailout (which will be clipped to the harnass) in the event that it will be needed.
The unit is a bit heavy on land, but will be tested in water soon to see the net result.
I am currently working on the PPO2 metering.
I would like to know where the optimum placing of the P-connectors would be, as I intend to run a 2/3 sensor display and then later on an integrated
VR3/HS Explorer. This means that the male P-connector will be quite long and I dont think the IDA CL is deep enough to accomodate a 2/3-sensor P-connector
Any ideas and views that can assist?
Regards
Johan