1. After thinking about the risks in feathering the "glass" edge of the fairing right onto the plexiglass canopy, I decided I was happy with it being about 0.25mm thick. So I taped up the edge again, sanded all the tinted filler to the level of the electrical tape, and called it good.
2. Applied filler to two very small areas on the edge that weren't quite right. They will be sanded tomorrow.
3. Block-sanded a few areas of the fairing again, after noticing some slight remaining irregularities.
4. Feathered the remaining areas where the fairing meets the top fuselage skin.
5. Primed the fairing.