So I did a bit now experimenting yesterday. One, I was turning the pot the wing way (oops). Two, it gets hot as falafel. Three, the cooling fan helped, though it wasn’t always the easiest to stay on target because everything around it kept nudging it. Four, I think it needs more juice.
Now to figure out what I need to do to keep the chip goosed with power, without overheating. Or do I want to replace that one driver with something more robust?