Calculating and cutting precise miter angles?

[myxpykalix]

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

[gc3]

http://www.finewoodworking.com/2011/08/04/build-a-tablesaw-sled-for-precision-miters

[feinddj]

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.

[donek]

best $30 I've spent in a long time
https://www.amazon.com/AccuRemote-Digital-Electronic-Magnetic-Protractor/dp/B006JR8XBG/ref=sr_1_4?ie=UTF8&qid=1477359456&sr=8-4&keywords=digital+inclinometer

[John David]

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