Sounds like a fun challenge.
The crossover on the tweeter is already there. Might want to update the capacitors or use an external active crossover where I can try different crossover points. I have the tools to modify the cabinet and mount the RAAL. The other option would be to place the RAAL in its own enclosure. When speakers are a hobby it's fun to try new things and learn along the way. Perfection comes with time.