I have been away a few days and am not up to date with all the discussions. This thread in particular seems to have taken more turns and twists than my diagonal reading skills can handle. Sorry for that, I'll try to read up.-
BTW: that Gumpert I referred to is a recording from 1979, with Heinz Becker, tp, flh; Manfred Hering, as, ts; Ernst Ludwig Petrowsky, cl, ss, as; Helmut Forsthoff, ts; Conrad Bauer, tb; Ulrich Gumpert, p; Klaus Koch, b; Günter Sommer, ds;
No small group involved.