Thanks — this is very helpful.
After finishing the bike, I’m taking it in for a bike fit. The fitter indicated he’d cut the steerer tube if needed, so I shouldn’t need to worry about that!
It’s been a fun project so far. I was never a gear junkie until suddenly I needed to pick out every component. I’ve also learned a lot about bikes, which was part of the point. Just hoping it comes together without too much frustration and results in a bike that’s well-tuned, safe to ride, and provides a new toy to get me through Freezing Saddles. I may have a mechanic inspect it when I’m done.