RE: Flywheel center as part of a prop hub.
Go to a few small engine repair shops and look for a dead engine for a crank. They throw they away or stock pile them and sell em cheap to a metal buyer. It is a lot faster and very easy. Make good friends with the shop owners (buy them a meal) and they will give you all kinds of deals...including FREE!!!! Capt,n
Also use av8tor,s Idea ....and use a circle saw to cut the hub...then true it in the Lathe.