Thanks for the responses. I have chosen to go the mechanical brake route primarily due to heat issues. My car is running 350g - 400g heavier than others (mainly due to batts...this I can address to some degree as I move forward) so starting and stopping that much extra weight really heats things up. Motor temps were in the 200+ range routinely...now it stays in the 160's. Big improvement.

There are two places at my local track that have a steep off camber turn right at the end of a high speed section or jump where you need to get really hard on the binders . I found that setting greater rear brake bias in this situation can help out quite a bit. Of course its a trade off though, since what works in corner doesn't necessarily work in another and vice versa.