I put together an observablehq notebook with a Stick fretboard (https://observablehq.com/@cscheid/hanon-01-diagrams-for-chap...) for me to work on some fingering patterns, but something like fretboardfly would be so awesome (even if it were just one side at a time). A configuration file like "string tunings + fretboard markers" would totally do it.
After reading your comment I dug around to see how many Chapman Stick players there were (What's the TAM for anything targeted at Stick players..if you pardon my startup-speak). The stick subreddit seems exceptionally small: 596 members. I'm guessing there are non-reddit niche community forums with much bigger numbers to boast of.
P.S. Mr. Hanon gets around (Started Piano lessons a few weeks ago and Hanon #1 was a part of my first lesson)
So, each Stick has a unique serial number. I got mine in 2021 and it's 6596. So that gives you an idea. I totally understand if the market isn't there.
"There's dozens of us!"