My objective was to devise an assembly line approach to this mundane task that would keep me moving quickly and efficiently. That method is as follows:
1) Use a fine file to knock down the major roughness of the edges. Don't worry about the lightening holes or notches yet.
2) Use the speed deburring tool to debur both sides of the lightening holes and any large holes in the rib.
3) Make one or two passes over the edges with a 3M EXL wheel in your die grinder. The 90 degree grinder makes this very easy to do.
4) Use the grinder with the 3M EXL wheel to debur the lightening holes.
5) Use a dremel tool with a dremel nylon reinforced sanding wheel to do the notches front and back
6) finish the edges and notches with a maroon scotchbrite pad
7) Use the "finger touch test" to look for any sharp edges or spots you missed.

Hope someone else finds this helpful.
Antony