Calculating and cutting precise miter angles?

Anyone have recommendations for a miter sled or way to measure a precise angle then cut it on your tablesaw?

http://www.finewoodworking.com/2011/...ecision-miters

I have an electronic gizmo that mounts on my table saw blade with magnets, reads to a hundredth of a degree. Makes setting the saw easy.

best $30 I've spent in a long time
https://www.amazon.com/AccuRemote-Di...l+inclinometer

http://in-lineindustries.com/product...riginal-dubby/
Works awesome. Rocker also sales a similar item. You could also build this easily on the bot.
Good luck
JD