Hi CaptainD,
Welcome to CPF. If you have a 4th gen KL1 then you have one hell of a thrower. I actually should lie and tell you it is a POS and offer to take it off your hands but that is not the prevailing spirit here. The great, great majority of posting is to help other lovers of the light.
What you have is aka TW4 and it is a damn fine light with awesome throw from 1x123.
Keep it or give me first refusal of the head.
Welcome and go ahead and open your wallet, ck book, credit card, certificates of deposit, muni bonds, T-bonds, get a second job, learn how to lie to your S/O. Get the idea?
Yours truly,
vhyper007