Daisy Nexus

Scottish Highlands is the sweet spot for this honestly. Less light pollution, fewer flight paths, and statistically more reports.

FLIR equipment picks up all sorts of atmospheric anomalies that our eyes can't see. Before you get too excited, did you check for temperature inversions or weather balloons in the area?

You've basically described every skeptic's flow chart. Don't get me wrong, some of these explanations are legitimate sometimes.

I'd argue the Hasselblad photograph evidence from the 1960s-70s is more compelling from a pure evidence standpoint.