I think I got it bled. I connected a long length of tube between the left rear bleeder and the MC and tied it down in to the rear resevior. I then pumped the brakes about 75 times, probably 25 more after the last seen bubbles. I then went back and bled/flushed each rear wheel since cycling the fluid back to the master dirtied up the fresh fluid. The pedal is nice and firm but we'll see what it feels like when I drive it tomorrow. Fingers crossed.