I've disassembled and cleaned mine numerous times, I have seven of them. I've never had the need to repair anything in a Fox action, with the exception of a silver soldering job to repair a broken guide pin on an ejector, which I did myself some 10-12 years ago. I've never had, nor heard of, anyone who had a Fox hammer/striker to break, and I've never seen a Fox action with "mushroomed out" firing pin holes from dry firing, though I have seen that on many other makes of doubles. I've asked old doublegunsmiths what make of vintage double has come into your shop for repairs the least in your career. "Fox" is the common reply, not because there weren't many made, Fox sold multiple times more Sterlingworths than Parker did Trojans. Part of the reason is so few moving parts in a Fox lock . . . . four, as compared to a Parker with sixteen per lock. You may not care for Fox's design in peening the threaded end of the yoke screw, but I personally do. It will never loosen itself and cause the gun to be non-functional. A simple way of heading off the possibility of a screw backing out. Why would you want to take it apart anyway, if it's not broken or worn out? An ultrasonic cleaner will totally clean the assembly without taking the screw out.
Personally, I'd much rather strip and clean an A H Fox than a Savage Fox Model B. Maybe I've just been messing with Foxes long enough that they don't seem to be difficult.
Take care, Dustin.