RE: O' Canada!
The weather was very power-demanding. Dez and I flying the Xtra 25-13 didn't have enough power, while Chad flying the Xtra 30-10 had marginal to adequate power. However, Chad was only pulling 55A static (versus our 65A), so he was a good ways off the 30's optimal output power.
We narrowed the problem with Dez cooking Xtra 25-13's down to some combination of four factors: inadequate air ducting, flying at full throttle almost all of the time, using the Hacker ESC, and using the APC 19x12e.
-Adam Glatt