I concur w/ mijostyn. I'd pass unless the price was very reasonable and you knew someone very capable of doing the work. I remember hearing that Snell didn't recommend reforming their drivers, just replacing w/new units.
Foam surrounds on 30 year old NOS speakers
I am considering buying a pair of 30 year old NOS bookshelf speakers. Since the speakers are new, will I not have to replace the foam on them?