Hi Bruce,
I think you should put a little crown in the central area of your panel, staying back from edges about 6in all around.
Then do your #2, shrinking one edge and then the other, back and forth until you get the panel to lay pretty closely. This is a standard approach for a panel like you have, and also for the upper triangular panel also. Putting in some crown first helps the panel have some geometry for support, otherwise you face the irritating flip-flop of an unshaped panel when you work the edges into their curves.
Might want to practice your edge working method on a strip of scrap/spare material first, though.
__________________
Kent
http://www.tinmantech.com
"All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.
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