[Overdriven]

What you've created looks alot like an extended hex, except that it is in 2 pieces. What about taking an extended hex with an 8mm bore, and drill a hole for the drive pin in the correct location. It'll be all one piece, and might support the axle better. Only issue then is you might want to use a sleeve or something on the threaded portion of the axle. Just an observation, and throwing out an idea. Cool truck man, I love those bodies.