Originally Posted by jeff12002

Chris,
I think you'll find that there are none that big with 1/4" shanks. the reason for this is that the torque required to make that large a cut will break the 1/4" shaft. It's a strength issue.
My experience shaping edges on plywood has been less than exceptional, and the glue between the ply's is pretty tough on bits. Keep in mind that my experience attempting this with plywood is limited.