I have been trying to make a more detailed post but it is being rejected as spam. For ship building, I need identical parts turned on a lathe. For example a 16" gun barrel in 1:192 scale is about 4-1/2" long and tapes in steps from 1/4" to 1/8" diameter. A 5" barrel is 0.9" and tapers down to 0.04". Generally the material is brass. There are a lot of similar parts I'd be interested in making. I am trying to determine if a CNC lathe would be cost effective. However, I can find virtually no information on where to start. What software is needed? What hardware interface? Are there any reasonably priced lathes that can do this small type of work? What add ons would I need?