Hey everybody, I am looking for information about the type of aluminium used for pot call surfaces. I have made alot of aluminium calls and they sound good. But they would be so much cheaper for me personally to make if I just ordered sheets of aluminium and cut my own disc's out. Just curious if anyone else does this, and what type of alloy you prefer to use?20-24, 50-52, 6061? In doing this I can also anodize it whatever color I like. Thanks for any help on this guys?