Sean,
Good report. Thanks for sharing your troubles. One miore reson for using larger tanks on RBs.. you have more gas to loose slowly, and more time to react
I have been thinking along similar lines to manifold my 7 L's on the KISS.
I took my old style MDE isolation centre appart and it looked to me that the inner centre thread is a Male DIN fitting. Hence the outer thread should be female and give you a ready adapter to go on the old style MDE pillar valve, rather than habing to drill through a plug. Haven't had time to try this out as my tanks are all full... but will report back when I get a chance.
As far as I remember, the new MDE isolation centre and pillar valve connections are standard DIN (female at the Pillar valve end, male at the centre end) - so a female to male decanting whip should do the trick nicely
.
Where are you going to get your stainless frame made? Would also be interested in one of those for the KISS if the centre stay could be adapted to bolt into the KISS CL case...
Keep us posted
Anke