from this thread:
correct
specifically the AA models have non removable bezels. The pill is press fit from below the glass. That means modification of the LED is not possible, unless someone breaks the glass and presses the pill back out the bottom of the head.
since you cant have a drop in, and you cant solder…
consider adjusting your dream, to include paying someone to modify a light for you 
I agree btw, that the stock Tool clip is not very good, it sits too low, and it can pull off. Mascaratum showed you how he solved that.
