I am putting in trim to finish off my basement theater (finally!!!!) and I was lamenting to my boss how bad it sucks to be cutting all the miters by hand. He said I could borrow his power miter saw. He said "its not a compound miter, but its better than by hand". So what is a compound miter. I'm assuming I can do anything with his saw that I was doing with a $12.99 plastic miter-box and hand saw. Yes?