I have a powermatic 80 in my diver and it's been flawless for the past year or so. Great power reserve and off by less than a second a day. It's a bummer that the movement can't be serviced. I think the safest thing to do is save the donor watch so you can always send it back for warranty repair. If it makes you feel any better this won't be much of an issue moving forward since it seems like most factories are moving away from the A2824 movement.
Where are you guys sourcing these from? Are they good quality? Can someone post or PM me a link? I have a gen starwalker and I really like it. It would be nice to have some reps to play with and compare.