After letting the 650 sit for a week and "think about what she did - overflowing the carbs for no reason", I finally decided she'd sat in the corner long enough, pulled the rack and meticulously adjusted the floats one last time. Once back together I put the bike on the center stand, turned on the gas, and fired her up! The idle was fair, so I borrowed my Dad's laser thermometer and used the temp readings to adjust the pilot jets until the pipes were within about 10F of each other.
Once she was dialed in, took her for a 5 mile test run. Soooo nice to be back on the road again! Going to resync the carbs tonight.