Anyone know how to get the best out of R9 290s on qubit?  I found this:

http://cryptomining-blog.com/4819-new-sgminer-with-optimized-quark-and-qubit-kernels/

But it doesn't have .bin files for 290/290x.

Best I'm able to get out of them currently is about 6 Mh/s which seems piss poor when you consider that 280Xs are reportedly getting 19 Mh/s.