Your topic is very, topical, for me today. I decided last night to finish up my little balanced PIMETA project only to find out that the 4-gang alps pot that I have only has three functioning decks. So I'm thinking that I'll have a go at the whole shunted pot thing. I'm pretty sure that I understand what's going on and that the illustration below is how I'll want to wire things.
I could have sworn that I'd seen a picture similar to this one that showed the actual wiring scheme (the "for idiots version").
If someone has a working drawing like that of the balanced setup it'd be appreciated as a sanity check.