Aluminum arrows are so easy to tune and they fly great. As an example, I'll use my 42# recurve.
Since I have a 30" draw length, I shoot 32" BOP length arrows. They're never shorter or longer. Just a constant 32" cut length.
If I want to shoot a 2114, 2212, 2213, 2215 or 2117 arrow, I just pick the correct point weight for all of these differently spined arrows and fine tune by raising or lowering the brace height. This allows me to shoot a light arrow, a moderately heavy arrow, a heavy arrow or a very heavy arrow.
Right now, I'm on a light arrow "mission" with a 2212.