This file will cut holes that align to your wasteboard on the Carvey machine. Make sure your material isn't larger than 6" in the Y direction. Once cut, You can use these holes to screw the material directly to the wasteboard.
Use this EASEL "link":http://easel.inventables.com/projects/IGeWTonFFnUtYCmR3GHqtA
This cut will determine how high the sidewalls are on the dish. I kept them fairly low, but high enough to keep water from overflowing.
Use this EASEL "link":http://easel.inventables.com/projects/OFweD61mp5wddsHxjSKbOQ
For this cut you will need to switch to a 1/8" ballnose endmill. The depth you are cutting is crucial for creating a nice channel. Too shallow and you will get gaps between the grooves, too deep and you will get tall brittle edges.
Use this EASEL "link":http://easel.inventables.com/projects/ZtD6NMfv8NC82L4GodxMoA
Unscrew your clamps and flip the material. Clamp the material back down, starting with the holes you created in step 1. This will ensure that the material is properly registered. Double check the Easel files to see that everything aligns correctly.
For this step use the 1/8" ballnose to cut the chamfer on the bottom of the dish.
Use this EASEL "link":http://easel.inventables.com/projects/8anDvMId3DNFR4OaMyVL-g
Switch back to a square or fishtail endmill and cut the profile of the dish out. Then remove the clamps, cut the tabs, and see how it turned out!
Use this EASEL "link":http://easel.inventables.com/projects/2SJyQzWysfRJ2Ts5wejklw