Well I got in touch with Todd and Bill regarding my 422z and 418B frames to be turned into 416 woofers. Bill said it is the same magnet structure. My (Physical) measurements re-enforce that conclusion.

Now, In all likelyhood I'm probably going to live about another 20 years; given the family history and my current health.

How often does Alnico need to be re-magnetized? I don't want to be confronting Pano's difficulties any time soon. The alternative to reconing these frames would be scraping together enough to get a pair of 416-C new from GPA.

I know this is a very subjective judgement and will take that into account as I make my decision. These will be Model 19 speakers at some point. The model 19 used a 416B. Those are $360 each and would be months away if I go that route. Maybe they are worth it. The drawing for the Model 19 is not clear as to wether they were front loaded.
The horns are driven by 808B with the new diaphragms. According to one source here, that makes them 802G.

Any comments are welcome