I just did a run with 6S1P A123. I forgot to change the low voltage cutout though. With the LVC set at 3.0, the run lasted 11 minutes.
Performance is good. Temps are well in check. The Batteries got up to 120, but the ESC and the Motor remained cool. ESC at 97, Motor at 95 degrees.
A123 with only 1P, the voltage seems to sag ALOT under a load.
I'm gonna try 5S1P 4000mah Lipo next.