I've been playing with bioses from s.A era, have my own custom bioses, but haven't spent much time with newer tools.
I'm tempted to try a mod on my spare AB350 Fatal1ty. It appears all of the bioses of a given brand are almost the same, because they are still on the early productions stages and the different branches are not so different. Some things are hidden for specific boards, although it doesn't mean if you enable them they will do something.
I'm most interested in updating AGESA from one board to another. Can't get the latest mmtool though.