Roof De-crown on 50 Ford

I am chopping the roof on a 50 Ford Tudor, I have removed 5-inches. The rear window area is challenging to get looking just right without sculpting it with filler.
I have moved the window forward a little which to me looks better. I seem to have more crown in the roof line than around the rear window area.
I am looking for a good flow by working out the metal.
Has anyone done this? Any tips or tricks would be greatly appreciated.

Thanks, Steve

 

Heres a link to my chop. We took a lot of crown out of the roof. Its not everybodys favorite way to chop but it worked for us. Hope it helps

http://www.jalopyjournal.com/forum/showthread.php?t=263398

 

Pictures.