UNDO torque ;-)

When finished , My Sprite will have wire wheels. I would rather not pound on
the new UNDO's. It's bad for wheel bearings and the new knock-off spinners.
I saw a  plywood tool that fits the external shape of the spinner to save
the chrome from being pounded on. I can easily build a tool to link my 100
ft/lb. torque wrench to this plywood piece. If I build this tool each
spinner will be tightened to the same value. the question is : What is the
correct torque ?
TIA,
       Mark Hanna
       AN5