Just a quick update from my race weekend. I mounted the ESC right underneath the rear braces but with no fans or heatsinks.

Since I am running the 52T spur, there is only room to mount the ESC. With no fans or heatsinks, I was thermaling right at the 3 minute mark. Gearing was 14/52 with 8000mah 4s. According to my wattmeter, I was hitting 1814 watts. Even when I set my throttle EPA to 75% and threw a couple fans on the esc, I still thermaled after 3 minutes.
I'm going to try mouting the esc and some heatsinks/fans on the opposite side of the steering servo. Time to get back in the shop and mill out a new mount. I'll also probably mill out the BPP logo to save a few grams.