In those days where I am bored but don't feel like jumping into a build I often make up degree meters from scrap wood I have around the shop. I mnake them in left and right so I can set up both ailerons or elevator halves without getting out of my chair when I'm setting up a plane. Easy to make and cost nothing. I like to know what the throws are and have a basic set up and I like to know they are even on all surfaces. It's just part of the set up for me. I have made the one like John showed but these are just simpler.
