Nice article man! You did really nice work with the riser cables. 2 PSU's seem like a bit of overkill though, I managed to get all 7 of my GPU's to run on one 1200 watt PSU(only 900 watts total). I wrote a post about it if your interested. Power bill over here in Japan is killer so I had to find a way to lower the power without losing hashrate
Not an overkill, single PSU is only 750W. No way that I an run 7 cards on it. Also electricity is cheap here in UAE 0.08 USD so it shouldn't be an issue