Today my Mamba went through the chains on a hole that I thought was pretty much un-aceable. I've not thrown another disc that likes to glide understable like the Mamba. When I first saw it's flight rating of -5 I wondered how that would really work...Now I know and pretty much agree with the rating. The Mamba just holds in the air on a turn and keeps going forward where most discs would be dropping/diving with their nose angle. It's place in my bag is becoming pretty solidified as it just seems to work every time I pull it out (which isn't all that often). The one thing that makes me nervous is that my Mamba seems a little more stable than most and I hope I can find a similar one at some point (domey orange max weight).
Have you tried a CFR metal flake mamba? I've thrown about 5 or 6 different mamba's and the metal flake (168) seemed more stable than all the others, which were all heavier. The metal flakes seem domier as well.