Really no point in this miner since with Silentarmy V3 on linux you can get 40Sol/s currently with the 290/390. With some tweaking OC you can get 45Sol/s probably. So with his 5% dev fee, you will most likely net the exact same amount.

I doubt Claymore can get more than 40-50 Sols with the RX 470/480 which you are currently getting with Silentarmy V3 for linux.