To remove the 10% dev fee on b8 version just edit the binary using vi editor :
vi xptminer-sse4-b8
:,$s/RUhMA8bvsr48aC3WVj3aGf5p1zytPSz59o/Your_Address/
(ENTER)
:wq
Are you sure this works? Ypool still reports a 10% fee for workers.
Yes, the fee goes to Your_Address...