I would think larger gaps would reduce the effect of the magnetic field from adjacent coils from adversely affecting the energized coils. In short, less cross-talk to put in audio terms...

Guys, do you think because I'm using a UBEC, the truck coggs alot?

It does not cogg like crazy lately, but when you hold the truck to the ground and give it some gas, it does cogg.

Maybe I should use a receiver pack, instead.