Thanks very much for your observations, Steve. Thanks also for your offer to communicate my idea to Jim Humble.
I agree with your opinion. I am becoming increasingly convinced that it is indeed a good idea to keep the quantity of MMS to a minimum. It seems to be effective at very low strength and that will certainly lessen any dangers concerning CDG instability. In an ideal world MMS would have the availability of hospital equipment so that the gas could be delivered in the same way that oxygen has been internally applied to intestinal tumours but that is something for the future.
However, if things are done properly there should be no real risk. The gas should not have the opportunity to make contact with the atmosphere. It should either be in the 'brew bottle' or in the syringe. In any case, the amounts are so small that any dramatic event should prove to be a mere 'flash in the pan' - so to speak.
My imagination has been working on the idea and I can think of a way in which the whole system could be enclosed so that the gas would actually circulate rather than have to be sucked from the 'brew pot' into the syringe, pumped out of the syringe into the intestine and then expelled (farted) into the atmosphere. I am still working on the design but I may try to build it when I have it fully worked out. It would operate by means of a small electric pump.