Ferro fluid replacement

Hi all, I recently came into a pair of ADS L300s. Condition is pretty sketchy so I’m considering them a project. Woofers seem solid but the tweeters are definitely sounding a bit tired. Considering the overall cosmetic condition I don’t really see me doing the Richard So treatment so I was wondering if anyone can tell me how easy/tricky doing a ferro fluid replacement would be? I plan on rebuilding the crossovers as well but I don’t see any difficulties there. Advice?