I run 2 washers in the rear on a shaved brace with the A hubs and green springs. Super dialed on our track, but ball stud washers are VERY track specific, and even layout specific, in my opinion. Our track surface is apparently unique. I've found higher roll centers work best on 2wds and lower roll centers work best on 4wds here, as compared to the rest of the "team" setups. We're not talking anything drastic, but even one ballstud washer is a big change for a 2wd.

Another thing, don't chase setup on the rear doing things you don't like on corner exit without first verifying 100% that your outdrives and CV joints aren't excessively worn. Corner exit puts those parts all under load and if they have notches in them, well, you're screwed.

Wayne