Another idea that just occurred to me is that I could use several pours. I know my original 6mm vitrine in test 1 cured hard in 24 hours, and I see no reason not to do that as a first stage. The next day I can add another layer until I have a satisfactory depth of coverage.
This may have interesting effects on the appearance of the vitrine. I’m eager to find out whether such effects are good, bad, or something in between.
Meanwhile I want to try soldering those SMD transistors I ordered by accident. The trigger input circuit for Bela Salt uses four resistors and a transistor, and uses power from the +12V rail. I could squeeze one, possibly two, trigger inputs into a vitrine. Once I’ve tested that with real signals and a real Bela in chapeau form, I’ll be ready to perform a full test. But that may take up to a week to prepare given my novice soldering skills.
Before then I’ll have days of curing time so this evening I’ll probably start a layered vitrine.