Center Section
I would definitely not use the tie down on the wing as a jack point.
A rubber padded 2x6 across the bottom, right under the spar carry through and 2 jacks is all you need, just like Greg Hales but not extending out under the wing attach points. The fuselage skin is attached to the flanges and more than strong enough to support the weight of the plane. A set of sturdy jacks, like those rleffler uses, will go a long way to keep the plane from moving around.
To change tires you really only need to raise one side at the time about an inch
and with the nose wheel as well as the remaining wheel chocked, the airplane has nowhere to go.
That's the way I do it and it works for me.