Not tried, but I think that the fact that they are joined together might make this a bit of a PITA.
I'm actually getting used to the extra clutter around the front, although I don't like it as much as my nice clean OC setup, I'm coming to terms with it, and the benefits always completely overshadow any little inconveniences...
Personally I'd dive it in the state you get it in for a while, and then have a good think about the most appropriate way to modify it, that's the process I'm going through now, and I'm having some thoughts of my own about exactly what I'm gonna do.
http://www.therebreathersite.nl/twinspiration3.htm this site is a twin loop unit and it had the second set of counterlungs mounted inside the wing, and I think ueing the existing connection holes.... perhaps something to look at.
Why didn't you get a KISS if you wanted an uncluttered front? If you wanted a full ECCR, then you could always fit aftermarket control electronics...