One more request Scottie, could you somehow find out max safe voltages for Core (not too bothered with it as I know the general limits and have good cooling solution to control the temps), Memory (very important as I don't know what vRAM the card uses) and PLL (Aux voltage in Afterburner, would probably only bump it a little).
I want to make sure the card doesn't fry itself in the long run and we all know how sensitive the memory can be.
Scotti should I hold off an attempt for now?
Don't hold off as the BIOS will at least unlock all the unnecessary limits but do one at a time. And make sure you follow the guide so that nothing goes wrong.
1) Make a bootable USB flash
2) Copy atiflash, the modified BIOS and original BIOS (use yours grabbed from GPU-Z, the one attached I'm not sure about). Rename your BIOS to original.bin or something that you'll remember in case you're gonna have to reflash.
3) Flash the card once and check if the shaders unlocked in GPU-Z. (follow the guide)
4) Repeat if they didn't and give up after second or third try
If they release a new BIOS, you can always reflash again.