Yep, I wrote and told Jim I could not think more highly of the NSS tool. My barrel was a bit sticky with the nut off, but at that point I just clamped it in the vice lightly with wood blocks and the action wrench had more than enough leverage to turn it off.

I looked at a lot of videos of people doing it and the action wrench looked to be the ticket. NSS is the best one I think was well, has the cutouts below as well as the area to put in the vice.

I was surprised there was not ore nut resistance, started easy and it came off (7 inches of the wrench and a breaker bar allowed easy leverage). Short wrench probably works fine but I liked having the insurance of the longer lever on the long one.