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Old 03-14-2016, 12:10 PM   #2631 (permalink)
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Originally Posted by freebeard View Post
Thanks for the updates.

On these holes in Mylar and sheet copper: Maybe they would punch better than drill?
The shapes are irregular. We started with a pilot hole, then used a wood bit for the mylar .. then a knife ..

The copper was done with a step drill bit. I cheated a bit and didn't use a new piece of support for each hole .. the way I should have ..

A punch with a proper support beneath - like maybe an anvil? .. likely would have worked. I'm glad the video didn't work out for that part .. it was sort of embarrassing!

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