Received my frame this week - overall positive impression, some minor imperfections in the paint that I can live with. Brake caliper mounts were not properly faced after painting (if at all), will need some work. Did anyone else attempt to resolve without dedicated (expensive...) tooling? Still awaiting delivery of wheels which are a few weeks out, so can't verify caliper fitment yet.

No, its velobuilds own design. (if that's a good or a bad thing, that's up for you to judge. I used a Deda 70mm Expander and a modified compression ring from the SL8 on my VB)

I found that my steerer internal diameter is only approximately Ø22,3-22,6mm - too small for the Deda 70mm expander to fit (requiring >23,5mm). Seems like most readily available alternatives require >23-23,5mm. Anyone else have experience with this? Perhaps the steerer has an inconsistent thickness, will figure out as I cut it down.

I am BTW modeling/mocking-up a 3D-printed spacer/transition piece between the stock headset dust cover and the SL7 stem. Think it can work and look decent enough.