End mills or cutters for CNC Router

I recently finished building my 42"X16"X6" cnc router. This router was built primarily for making model boat hull patterns. I have experience with cnc mills for metal work but this is my first experience with a cnc router cutting wood.

I digitized a 1891 hull design using Rhinoceros 4. Boat hulls are generally speaking organic shapes with all surfaces being curved. I have cut three with pretty nice results using a 1/2" HSS ball end mill.

I am wondering what end mill is best for routing out these hulls. As it is I am horizontal roughing and paralell finishing with the same ball end mill. Parallel finishing passes are at 1/16" intervals.

Although I have been using a ball end mill I am wondering if a standard flat end mill would work as well or better?

Any insight about cutters/end mills in routing would be appreciated.

TIA,

Jack