The final Blissz D3 system that's out there is so great. I have it on all of my D3s. (If only I'd stuck with S9s, but I had to "diversify"). The interface is so much more attractive. It offers the option of setting freq and volts on each board. And you can optimize fans for performance or sound. It really sucks that a couple of people scared him off from continuing his dev work. It was far more accessible than the bitmain FW.