Ok, time to contribute. I got the fatdaddy's 8w switch set...a) better bottom switch
b) enables me to "kick" the 19 with an 18650 flat top.
You just have to remove the adjustment screw from the head.
I've been lurking this thread since I got the 19 from my KICK ... Brother-in-law. I have a glued switch so, although I tweaked it enough to enjoy it, when I got a kick I never thought about clearance. So I tried buying an extension tube as seen in other posts on here, but I got an 8w 18650 tube from 101vape.
It's not fully threaded.
Decided to buy 8w switch combo after talking with Dennis, from Fatdaddy, on facebook. He told me how close it would be but since I had a spare tube any way I risked it and with that little screw outta the way it closes and covers all the threads. Just wanted to contribute.