You don’t have to destroy the speakers to experiment with a different Xover. Testing with an outboard xover board is pretty simple.
Especially when the speaker is ported! :)
I really encourage modders to either A) Keep it simple and swap maybe the tweeter or mid range caps or B) Think about the entire crossover design.
The Focal profiles for instance had many resistors and caps in the bass section which could have been swapped, but what they needed was to remove all the resistors and add an inductor to raise up the impedance while keeping the frequency response constant.
My point is, if you start thinking of doing much more than simple cap swapping you should step back and consider starting from a blank sheet.