Get a wooden board+cardboard insulation and do it on the floor.
Where did you buy your steel plates? Any recommendations?
Discussion
I just bought one of the cheapest from Amazon to try it out 😅
But i heard the ColdTi should be pretty good.
I want to punch it in full words and not those bip39 point punch things as i think it is more likely to make a mistake with those.
You have done it with cardboard? I imagine one has to punch pretty hard. Is it enough to protect the floor?
Cardboard is definitely not enough, but a wooden board, plank, a piece of solod wood on top of the cardboard should be enough protection.