("Richard Lamb" wrote)
If it's a wood prop it will likely have a center hole.

A balance tool for that is fairly easy to make.

Find / machine an aluminum round to fit the hole and bore a center hole in
the round for a 3/8" dia steel rod (axle).

Put the plug in the prop and poke the rod through the plug.


You lost me here. How far does the rod stick through? Does it matter?

I have no idea what's next. Where does the balancing take place? How?

Having a tough time trying to visualize how one balances a wooden prop using
a rod.


Montblack
No clue how a person balances any prop.