I have a piece of 2" x 5"OD aluminum round stock that I'm going to machine to fit the stock flywheel. (center over the flywheel nut, bolt on with 4 M8 bolts) All the Eiffel clubs will be plain squares, no hub, but will have a center dowel hole for aligning on the aluminum hub. Then I'll have a flat plate to clamp the clubs to the aluminum hub. (4 bolts) That's the plan, anyway.bl_dg: Are you going to add a center hub to your Eiffel Club, or bolt it on as pictured? Perhaps with 2 bolts?
Did a little more on the test stand. I got a piece of 1/4" ply mounted for the dash panel. I replaced the wood screws holding the side plates with 5/16" hex bolts. I also got the motor table mounted, and managed to get it to fold for storage inside the uprights. Now, it's just two pieces - base and upright assembly.