Rob English is right on spot. I reached about the same conclusions. So I'll be sure to have a few washers of various thicknesses as I'm working on the engines.
As for driving the axles out of the wheels, no need for a wheel puller. You need to support the side of the motor on both sides of the axle. I usually can work that out with a few pieces of wood and a clamp or two. I'll post some photos of how I do that.
