Now if that isn't love, I don't know what is. I'd fall over if my wife bought a SureFire for me. She has NO clue how much these are and certainly would never understand.
Now as for the KL4 on an E1e, the light is not too darned much brighter than a KL1, just a different color temperature. It falls out of regulation within a very short period of time and should only be used with 6V.
As for the clickie, I put mine from my L4 on my E1e that has the KL1 with the Red LED. If I had another, I'd put it on the one with the Blue, then the one with the Green. It seems better suited for the short light and is too sensitive for the way I carry my L4.