I was thinking the fork crown would be machined, if it matters. Not many thin walls.

[MENTION=128980]Catnap[/MENTION] - I agree. I am going to prototype nearly the entire bike. I think showing the prototypes to the builder will help in the relationship. I don't think throwing drawings over the fence will end well in any way.

I did print (in plastic) and earlier version of the stem and brake levers. The stem changed and I need to reprint. I have bought some different aluminum bar (6061, 3003) in different wall thicknesses and I have made the bending mandrel. I haven't gotten to bending the bars yet. I'm thinking about hacking a Light and Motion 360 to use in the bars.

I think I'll also take a swag at the rack and lock combo. I will definitely fabricate the lock. I don't have the brazing experience for the final build, but I certainly can weld and bend stainless. I make that sub assembly, the rest of the bike is pretty straight forward. A couple of screw bosses in odd places.

I will print the rear dropouts in plastic first as a proof of principle. I am curious about attaching the stays. All of the videos I have seen have the straight slots cut into the stays. But then I never see how the builder bends the stays. If they go in straight, that would require to bend the stays. On the other hand, if you angle your slot cut, the stays can remain straight. Is one method prefered over the other? And then why is that?

And [MENTION=57478]repechage[/MENTION] - Yes, this is an Italian city bike using modern tech. There is nothing new under the sun with regards to bikes. They are too simple of a mechanism to have anything "new". And while the geometry maybe from a city bike of the 50s and 60s, it is also a race geometry from the 30s.