What would be even more interesting than testing an M22 before and after the mod would be testing the skiing ninja crossover mod against a mod with the same electrical specs as Axiom would build it -- e.g. without the expensive parts.
That certainly is a comparison worth making, and perhaps Ian and/or the ninja could make that happen. However, there are several mods created for AV123 products that are not a new design, but simply upgraded parts and a layout optimized to reduce crosstalk. There are a variety of before/after comparo's of them floating around on the AV123 forums. If anybody living near to very many of you had some of those, then a comparison of those might be interesting too, especially since it won't be a speaker that everybody here is already intimately familiar with.
The redesigned networks would certainly be a more dramatic change than the ones with only upgraded components, but how much change each makes is certainly a question worth asking.
Frankly, I'm considering getting ninja mods for my RS450's and I haven't had an opportunity to hear them so I'd be going solely on what other people have said as well. I've only heard the ninja modified RS750's, RSC200, and Ref 1's.