Ok, found Match's thread here. I know I've read it before, but not sure why I missed the use of the P60 pill and the simplicity of it! Gonna have to put this on the "to do list". I'll probably go with the 2AA route so I can easily gift them. Seems like the low voltage Solarforce drop-in's are the easiest way to get the parts - that right? I see there is no low voltage XM-L though.
-Garry