Unless you are highly skilled, you can't just drop in a few parts in the stock network and expect it to work properly.
That said, if you are highly skilled and want to do it, I say go for it
I wasn't suggesting "dropping in" inductors and capacitors into the existing network. I was suggesting making a new "network" using cheap parts (the "network" is nothing more than an inductor in series with the speaker, and a cap in parallel for a 2nd order XO). I'm not sure what the individual impedances are in the Axiom speaker, but if they are 4 ohm, you would only need to buy a .45 mH inductor and a 14 microfarad cap.
Anyway, I'm sorry you are not sending it over for testing, I was really looking forward to seeing the results.