I just sent Floyd rose a big sappy email about how I love their trems and how sad I was that they don't currently offer them for 8 strings. It wasn't kissing their ass but it was showing that companies are currently making production 8 strings and that kahlers aren't cutting it as no one is using them(besides halo, and no one is buying what they're selling).
I asked them what it would take to get the ball rolling if they aren't already working it out for themselves. good god i want an 8 string OFR.
I think it would be bad ass, but an 8 string OFR might feel really stiff because of the string/spring tension. I notice a big difference between my 6 and 7 string trems, I can only imagine how an 8 string fulcrum trem would feel.