Guys I am about to cut metal to fit a  16 inch spinner to my three blade

"IVO" propeller and would like any advise on  your favorite methods

of making a pattern of the prop to avoid ruining a very expensive piece

of aluminum. Attached is CDP (cheap digital photo) of what I am

dealing with. All comments and advice appreciated.

 

Thanks,
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2