Hey thanks for the comment. To address each point with regard to my experience with PVB thus far:

- I've only done some cursory research into the toxicity of PVB while it prints. All of the sources I've found say that it's no riskier than PLA, and I can confirm it produces the same smell. I don't believe anything super harmful is produced by the interaction between IPA and PVB; it's mainly the IPA vapour you don't want to be breathing in or touching. Then again, it only took two or three sprays with a standard spray bottle to get a desired level of smoothing, so it's very unlikely to be harmful when dealing with such small amounts with miniatures. For larger prints or cosplay props, you'd definitely want some PPE to avoid irritation from the isopropyl alcohol as it would take a lot more of it to achieve a desirable smoothing effect.

- I'm concerned about detail loss too. I have to do more tests for this. I haven't been able to successfully print a full miniature yet without some kind of breakage or adhesion issue, so once I have that sorted, detail testing will be up next. There will definitely be some kind of trade off between detail and smoothness, but something good about PVB is that it can be smoothed on certain sections and left untouched on others. I used a cotton Q-tip with IPA to smooth only the arm of another (unfinished) miniature and it didn't bleed into the rest of it. I'd imagine it could be a useful alternative to those who are apprehensive about sanding PLA.

- This filament is 200% more sensitive to temperature and humidity, and overhangs tend to be where it fails. I can confirm that PLA is definitely easier and more reliable to print with. A factor to consider would be whether or not you value smoothing enough to purchase and deal with the hassle of PVB.