Hey... you can get an Avalon unit to do 720 GH/s. It's totally easy. Just put 12 BFL singles in the case. Just a bit more wattage than a 4 card Avalon and you'll have room to spare AND you'll get almost 3/4 of a TH out of an Avalon.
You missed out a few steps: get into a time/alternate reality travel machine, go to whatever dimension you can obtain 12 working BFL SC Singles, procure, return to genuine reality, realise they were all a figment of your imagination.