I was super paranoid, and bought one of these metal stamping tools(https://www.amazon.com/gp/product/B07ZFB5J15 https://www.amazon.com/gp/product/B07ZFB5J15), a

I was super paranoid, and bought one of these metal stamping tools(https://www.amazon.com/gp/product/B07ZFB5J15 https://www.amazon.com/gp/product/B07ZFB5J15), and made my condo neighbors angry for one evening :) but hey, completely airgapped!