I've got a source that can buy me some older Owls at the Canon employee discount. They appear to be non-PF, and go for $19. From reading the old posting notes, I know that they're "wire able", just a weaker flach than the PF. Bottom line, assuming the "refurbish" is not a problem, is this a good enuf deal to warrant putting a couple aside? Has anyone tried putting a Garrity flashlight "booster" on the flash?