End of this thread: https://community.ultimaker.com/topic/15979-ultimaker-3-cores-in-different-nozzle-sizes/ you can kind of do it with a dual-extrusion Ultimaker 3(+)
Would that be desirable? Wouldn't you want everything in a constant resolution?
I was tempted to buy a mini-printer - something like this: https://m.gearbest.com/3d-printers-3d-printer-kits/pp_009130968473.html?wid=1433363 @ $109 for printing fine things.
But then I discovered resin 3d printers have the best resolution of all and are getting quite affordable. Then I got put off because the resin seems like a nightmare to deal with
@jhol I meant fill the interior with a big nozzle and reserve the fine one for the outside. But a lot of printers make the interior hollow so maybe that wouldn't save so much time.