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Glaskocher
1 year ago

If you only want to make holes in foam, then you could try to find a pipe that fits in diameter and is made of plastic or metal. Feile or saw the front edge of the tube to form a sawtooth profile and set it rotating to the first “bore place”. Turn it back and forth until you get through. Put an old jeans or comparable down so that you do not scratch the subsurface unnecessarily (plastic tube). At the metal tube take a piece of wood. You’ll have to push the cut out after every hole so that the next hole is as easy.

DerBayer80
1 year ago

With the matching hole iron, a hard base and a hammer.