I think I see plan "B" um, unfolding. Looks like the key is to remove most or all of the flutes on the inside of the coroplast where you want to have a curve. I will have to try it.
A little web searching led me to this little homemade tool to cut out the flutes.
There is a bunch of folks that use coroplast to build R/C combat aircraft and one guy removes the inside fluting with a homemade cutter that looks like this:
Removing the inside fluting makes the coroplast very easy to curve. I am going to give it a try. The worst I can do is screw up $20 worth of coro'.
Stiletto, great looking layup.
Thanks for the suggestions.
Jeff