Or how I learned to stop worrying and embrace the protractor...
Did I mention cutting crown molding was a black art? Those corner units need a 22.5 degree angle cut, and my miter saw has an indent at that angle, but of course it's a little bit off, just like the 45 degree indents and so you have to measure each time you switch it from one side to the other... But eventually it's all up and done and really looks nice. It's just primed right now but the whole thing is getting a fresh coat of paint and all cleaned up and one more step complete.