That’s a shame Robert that your work on this issue was put on hold. However, as this problem has a negative impact on a larger project I'm working on at the moment, I've been asked by my employer to develop a patch to resolve it (see the pre-existing ticket, MDL-17258, on the tracker).
I've started a new forum thread discussing the problem and asking for ideas and suggestions from the community, if you or the other posters would like to contribute.
Expressing calculations in the form of letters instead of numbers
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