Forge

On the "someday, maybe" list.

I'd like to try making Damascus style kitchen knives - they're beautiful and good ones are worth a lot. They require basic forging equipment

Induction Forge

The electronic aren't that difficult - terrifying and they require a bit of complex tuning and math, but fundamentally only a few parts.

Power Hammer

https://www.youtube.com/watch?v=a2AcdxbTarM

Most designs seem to work on a cam/crank, but I'd rather go pneumatic. I'm having trouble finding exact numbers on the force (momentum/Ns) of a hammer. But pneumatic should be enough and it would give me more control over both speed and power.