That's the more difficult part, especially having to monitor for more than 1 scooter and 1 SCR discharging gas. But not impossible...
using a UV 26, its not a big problem, you "monitor" your bubbles fron time to time,when you are slow.
Whe are using a protection all over the EDO witch drive the bubble near your neck most of the time.
I probably was the first to close the EDO-04 (i.e.
XCR). However, I only need to remove 1 mushroom valve. Which other one did you remove ?
Of course to turn into mCCR you remove only the one mushroom whitch allow the gaz entering the "small" counterlung ( increasing exhale work ) and when you inhale, the gaz of the small CL go into the water through the exhaust valve ( increasing inhale work ) but when you are in CCR mode ethen the exhaust valve is not used except if your are other filled.