Whenever i have a knife and see a thick electrical wire i have to stop myself from “just testing” what would happen if I cut into it. I work with 400v ac on a construction site a lot and I know what would happen lol.

Oh that sounds so cool, you got any videos of those machines?

I could do other tunneling methods, but I really want to make a TBM specifically

I want to make a tunnel boring machine for digging ~2 meter tall tunnels in sandstone. Sadly I live in a place with only sand in the underground and that’s not suitable for digging tunnels DIY style