No questions Sir, if you read carefully, we are not trying to just make a control horn, but a good looking and good performer piece.
In my case I use old credit cards, much better (and cheaper) than your suggestion, but thanks anyway for dropping by. Note also that since this is a hobby, we do not spend time on doing it, we enjoy the time doing them, today I did 8 new control horns, good for 2 more planes.