I did my brace-end notches over the weekend. I followed Bill's method of using a sanding block from his Building Kit Acoustic Guitars book, and they turned out perfect.
The block with a .10" groove, used to sand the brace ends and then to set the depth of the router.
I used my laminate trimmer to rout the notch, but wanted to just rout the kerfing and leave the sides. So I used my high-speed inlay tool to trim.
Here is one of the notches.
And the fit.
I'm an experienced woodworker, but this is my first guitar. This method made this step easy!