I love my E-pede too. Losi front arms, Nitro rustler aluminum uprights, nitro wheels, Imex claw dawg tires, Traxxax hawk aluminum motor mount & guard, CVDs, Alum front shock tower, Tmaxx body mounts, RPM front bumper. I had it with a brushless motor for a while, but later decided the speed was not necessary and was a bit much for the kids.
I just got my 4 year old a Rustler roller and have done similar mods to it to make it wider using HPI Nitro Rush front arms.