Sounds like a win to me! Erica's "zoned" approach to power is something others have latched onto as well, with Arturia's Rackbrutes being good example of that. But the Erica cab build quality is also a plus...the only thing about the 3 x 126 that you'll need to watch is module depth, as it's kinda shallow over the P/S itself.
-- Lugia

Yeah I was doing some googling about that, I've got 4 modules at 50mm deep (plasma drive, es-3, es-6, es-7), but I think the 7mm of clearance will be enough since I'm putting them in the corners