Nice job. However, Im not sure if you are aware than many of us just use a keyhole bit successfully with our carvewrights. I'm know you can do it with the Rock Chuck and I'm pretty sure it also works fine with the Carvetight. If you search the forums for keyhole you should find the relevant posts as well as sample mpc's on how to set it up. If you cant located them, let me know and I'll dig the up and post back here.
Here is the post I was refering to:
http://forum.carvewright.com/showthr...hlight=keyhole