This vehicle should have been quick and easy to assemble. It uses two of the prepared assemblies.

But the wheels were not well-placed, the four units at the rear being too close to the rear of the flatbed. And each assembly seemed to be parented to to the flatbed; I couldn't find any way to move all four as a single unit.

I suppose it's easy enough to fix -- just pop a primitive in, parent the wheel units to that, and parent the primitive to the flatbed.