I stumbled on this Osprey Madison pen while looking at nibs. They have lots of different nib grinds for it and the cost is pretty low ($30-37).
I've wanted to try an actual architect grind nib (not a blade) but didn't want to spend too much, so this looked promising. Looks good so far, and though I haven't inked it yet, the nib still feels smooth on paper.
Line width should be about the same as a typical 1.1 stub, but with variation in the opposite direction.




For comparison, this is a "long blade" nib (On a Hongdian 1861). The tip is a lot more rounded where it meets the paper at most angles, where the architect is flat.

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