Just listening to this. I agree with you, Larry. Dynamite is easily the best-sounding Supersax record I've heard. As you say, it's MUCH looser than their earlier records. Before hearing it, I'd never really warmed to the band because -- to my ears -- their records were just too tightly-arranged.
I wonder if Brunner-Schwer played a role in getting the looser vibe on Dynamite. It was the only Supersax LP that he produced. (Supersax's other MPS release, Chasing the Bird, was recorded in California and produced by Med Flory.)