I ended up using a cheap P60 incan drop-in from DX. The host of choice was a Solarforce P1. No incan headlamps in my collection so I wanted something with a polymer body that I could mouth-carry without chipping a tooth. And I did end up doing that for about 30 minutes one night.
The beam looks nowhere near as good as what you guys have. Also the hotspot was too small to be usable around the house. It was a better general purpose light after swapping in a diffusion lens but the that made the light not too useful outdoors.
The momentary switch goes great with battery guzzlers. I worked through roughly 8Wh over the week according to my charger. The idea of burning through 2xCR123A every week is a little horrifying. And I didn't even use the light that much! It was inconvenient and bulky enough that I never actually
carried it for the most part. It usually sat on the table next to me and I'd have to remember to bring it along when I thought I'd need it. Went with no light on a few occasions where I was caught unexpected.
Glad to return to my usual 5mm yuji challenge