Great comment. Wow steam engines are great, and at small scale they are even better. Dual action, those centrifugal governors, and the smell of that lubricant oil mixed with hot water. I'd never before considered messing about with small steam engines to be hacking... That used to waste many an afternoon. Don't fuse the safety valve though, that's a bad way to get power and eye brow re-growth takes ages and annoys one's mother.