Yeah, it's a bit of a problem...but according to Perfect Circuit's specs, the 2 x 140 has 3A on the +12V rail and 1A on the -12 and +5V rails. But this only seems to be an issue on the -12V rail, since the build I specced was 887 mA on that. Everything else is within tolerances. Plus, the only ones on that -12V rail that do concern me (Braids clone, SWN, Zadar, Timizoara) don't appear to have significant -12V draws in of themselves, or they don't draw from that at all (BitBox). The big thing to watch, IMHO, would be dealing with B.'s "zone" configuration, as that master output gets split up sort of like how the Arturia Rackbrutes deal with the same issue.
EDIT: Saw this in another post of Jim's: https://www.perfectcircuit.com/wmd-soft-start.html A handful of these on your worst start-up draw culprits should smooth out that -12V rail at startup.