Interesting project a machinist friend of mine brought up.
On these smaller mills and lathes, he complained about how even at tiny depths of cut, they lack real power or spindle stability.

We began discussing a powered fly wheel.

Effectively it could be added easily to anyone running a belt conversion on their mill, simply requires using a pulley with another tract running to a balanced weight.

It would increase spin up times as well as apply some load during speed changes, but would in practice apply a decent amount of dampering.

Any thoughts? Hoss?