BAMT and mixing r9's with 7900's

[Okilo]

With version 1.3, the r9 270 runs about ~450 and my two 7900's hit 590 & 610.

With 1.4, the 7900 series hits 620 & 650, but the r9 isn't even recognized by aticongif, although lspci sees it. The config file is the exact same.

I have read the official BAMT thread and understand that the versions are geared toward certain cards. Obviously 1.3 is my choice for now, otherwise I lose the khash of the r9 entirely.

But, is there any way to somehow get the best of both worlds? Can multiple drivers be installed and utilized by BAMT? If so, how?