Jay, Jay, Jay...remember: The devil is in the details!! The clever and devious Ellen has sidetracked you and now you've done all that research.... Tsk! Tsk! Tsk! Ok, in spite of the penalty for revealing the Secrets of Framery, which is having my brand new '76 GMC pickup disappear in the dark of night, I will explain the Framers Secret Handshake. Only because you're a fellow guitar player...
The whole purpose in calling it a handshake is to confuse eavesdroppers and cravens who wish to join the Society without first having been initiated. It's not really a handshake, and, unless you know what it is and how to execute it properly, you'll never see a group of Framers greeting each other using this sign of recognition.
Framers greet each other informally with any old handshake. Some will appear to make it LOOK like it's secret, but that's to perpetuate the myth. The proper, internationally recognized Framery Greeting is to stand on your head and fa*t the song, "You Light Up My Life". I tell you this only because I like you and admire your quest for knowledge. Any knowledge. Whether it be contemporary or arcane. Good luck practicing.
As 'fuel' for this exercise, I suggest you eat a sumptuous meal of boiled eggs, black-eyed peas, sweet potatoes and collard greens. That should start you on the right path!
Sorry, Paul...was too good to pass up...