Bob the one that's in my signature I'm thinking about putting the weaker hammer spring in because right now it' set to the lowest power and it's still too much hammer and wasting co2.
Nope there's no serial number on the slides.
Bob I checked into the mini lathes from Harbor Freight however they don't have any in stock here in town China products I think might be a little difficult getting what you want these days because of tarriff's