There's a string of tiny holes whose only purpose is, I assume to weaken the PCB in a perfectly straight line ... although someone in this thread commented on the recommended process, quoting the GHpad thread from afar into the past. Score repeated, I assume across the tiny holes, all the way to the other edge?
Then carefully press the 'good' PCB to a countertop, and lean heavily on the 'bad' part. KerSNAP!
...oh, and I got mine today. Yay!