Copy Part Curvature

I have a curve sail that has a back support, and I'm having a hard time trying to copy the sail's curvature to the support so they can fit back to back. I've made the support using a copy of the sail and then using a curve split line to project a sketch and then using the feature split to cut out the part. I've also used an extrude cut, but for whatever reason I just can't get both curvatures right, any suggestion? Thanks.

SolidworksParts And Features