If anybody needs an instrument template that you can use to center punch and match drill your "paper doll" instrument panel, here's a template for 3.125" and 2.25" instruments. Automotive instruments like oil pressure or mixture meters are often 2..0625 diameter. See http://www.craggyaero.com/Drawings/Instrument%20Hole%20Templates.pdf .

A hole saw is quite useful for this endeavor as well, unless you can borrow an aircraft instrument panel punch from somebody (local EAA chapter, perhaps). I used dumb hole saws and a drill press, although just a drill works fine also. It goes pretty quick....

Mark Langford

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