A higher voltage cutoff on the rear motor/ESC wouldn't be a bad idea, actually. A123s are pretty good about keeping their voltage up, and the discharge curve is pretty much flat for the entire discharge process, so it should work pretty well.
SH Z-Car, Custom Crawler, 8s Savage, 12s XTM XLB 1/7 buggy, 4wd 4-link rear/IFS Pro4 truck, Custom Hyper 10 Short Course, Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz
Gordon's buggy is definitely one I have known of for a while (and perhaps some of my inspiration), I'm simply going to try to improve on the design to make it more suitable for racing. But he also used a buggy, which has a nice flat plate to mount everything to, and mine will be a Revo, which won't be so easy to work with (IMO).
SH Z-Car, Custom Crawler, 8s Savage, 12s XTM XLB 1/7 buggy, 4wd 4-link rear/IFS Pro4 truck, Custom Hyper 10 Short Course, Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz