My CP is also similar, but I'd recommend having curved surfaces on the outer edges of your MDF base. This way the T-Molding goes on nice without any wrinkles at the corners.
You may want to experiment with a 1'ft piece on a scrap piece. I rounded my CP, but it wasn't quite enough for the T-Molding I used, which has a nice lip that wraps around the top of the CP.
John