I can well imagine it 3D printed 
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Started on another model of a model of a steam locomotive. Steam valves and eccentrics next. For scale the wheels are 58mm diameter.
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A little more progress. Unfortunately a lot of new stuff hides the interesting bits below.
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I grew up in a family tool & die shop. we had a lot of old conventional machine tools. The manuals for those machine had renderings that I would look at for hours. Your posts remind me of those days. Your basically a room full of draftsman!
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Lots of parts yet to add. I’m omitting screw threads and springs for the time being. Every first-level component is solid, as usual.
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Just the cab parts and a few other details left.
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All you need are some baubles, tinsel and a small snow covered tree and you’ll have a Christmas card scene. Nice work Dave.
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Maybe when it starts to cool off here I can think about that.
Interesting how narrow the gauge is compared to the width of the locomotive.
Yes. Most narrow gauge power and rolling stock looks kind of top heavy to me. Almost like they would tip over if you sneezed in the general vicinity. I suppose a locomotive like this would have been used in a yard or maybe in a factory to shunt wagons around. Mostly slow moving operations.
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This article may be of interest. A bit of history.
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After @TysonK’s live stream last Friday I gave his 1.25 - 8 threads a go.
Tap on the left to create internal threads. Lead-in created with the cone at the top. Tyson 3D printed the nut and said it fit nicely on the spindle of his lathe.
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Ya, thanks @DaveR , it was remarkable how well it fit directly, especially after I had a few attempts that were close, but those tiny, tiny details that make all the difference.
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I’m glad it worked.
BTW, you could model your entire chuck sans threads and import the tap component when you’re ready for them. I suppose the chamfering component and the tap could also be combined into a single solid component but I generally prefer the two operations.
LOL 
Mostly done. A few little parts to add along with a lot of screws and rivets. Strangely there’s no coupling hardware shown in the original plans. Maybe I’ll scavenge something from an earlier locomotive model.
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Is this your house?
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That would be cool. Alas it’s not mine.
Follow the Acme v. Wylie Coyote lawsuit for a good primer on liability law.
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