Paul,
The basic concept of what I'm doing applies to the old Eboni inks as well as the "new" (which are supposed to be identical to the old but I find print slightly differently -- in fact my last batch of the "old" Eboni was nto consistent with either the 2 year old or new inks).
It appears that you have chip version 6.3, where the carts are not ink-position specific. So, you can juggle the ink order of your current setup. As you discovered, this is a double edged sword. People are able to install the carts improperly and not know about it by the printer refusing to recognize the misplaced carts as invalid.
Note that in this round of experimentation and profile making, I have not only come up with this alternative Eboni/Carbon-6 ink arrangement -- "Carbon Variable Tone" beta -- but I also have made a number of profiles for the standard Eboni-6 arrangement. They are not posted yet because MIS is not selling the new Eboni as far as I know.
With the variable tone arrangement, one thing I'm experimenting with is profiles that are very insensitive to variables such as ink mixing, ink and paper batch differences, and even totally different papers. Getting a carbon inkset that is more flexible and easier to live with is part of the project. This needs to be simple and as problem-free as possible for a wider market to be able to take advantage of the benefits this approach offers -- like the best image stability and lowest cost.
Paul