DO NOT ATTEMPT THIS
Three attempts with a single 8vrm board for tests and each time i got the same result, a CRAZY buzzing noise from each VRM.
I have had this before from a board that got RMA'ed.
edit: few minutes after powering off i hear this clicking noise, like a switch being flicked. I also heard this on the faulty 4vrm board.
just did this and i can confirm it works and i hear no funny noises...i used same volts as he did -0.0527

5-8c drop in vrm temp, i'm rocking 2 241 n 2 271 now...temps all below 50c and the 8vrms mods are lower temp then 4vrms n oc'd more man i wish i had more 8vrm mods...
730gh/s 10200 WU with .31 hw errors...guess i'll wait for 24hr avg to see if it holds yay!!