Marc,
To be honest, you lost me as I didn't follow the warning you mentioned.
Yes, a few years back, I converted the EDO-04 to mCCR (link @
XCR) and really enjoyed diving it for a while. Then I needed to buy some other units thus selling it to a friend who dived it only as a SCR...
The unit I have done is simply adding the CL at the bottom of the scrubber, and the rest of the functions remain the same.
See picture...