I've held off on using 2 amps, because I knew I'd be pushing up on the limits of my standard. But now I've gone there and there is no turning back - I'll either have to work with leaner patches or get an ultra. I build a patch around the Trainwreck & ODS amp. The trainwreck is clear and sizzley, and the ODS provides the beef. It sounds so much fuller than any of the single amp chains I've used. Gone is the slightly choked response I sometimes feel, and I've gained some of the stringyness I've been after. This really opens up a whole new realm of possibilities. So many amp combos to try, and I haven played around with having one amp more driven and one more clean.