Sandy,
I don't know why you had the problems you had but it sounds like a little more CC did the trick.
I am using a KF3.1 but as far as wicking they are both the same the KFL and 3.1. I wicked mine with about a 2mm coil and enough CC that I am able to drag the wick back and forth in the coil with a fair amount of friction. I then cut off the wick ends to just reach the bottom of the well deck (no L shape) just barely touching the bottom. I actually was concerned that I cut them off too short but it worked with no dry hits from the get go.
The only time I have trouble with my Kayfun is when I over fill the tank. If I don't leave a pretty big air pocket at the top there is just too much vacuum to allow the juice to enter the tank well.
I fill using the bottom port with the Kayfun upside down (duh) and fill until the juice level reaches about a third of the way up the clear window. If I add anymore juice than that it will dry hit, wick slowly, just generally give me problems no matter what wick material I use.
Anyway not much help I am sure but the Kayfun has always given me trouble wicking and as I said if you over fill the tank it will not work very well at all regardless of the wick material. Try what you would think is under filled and I'll bet you find that solves a lot of problems. "Go-Figure"
Thanks for the reply. Since I've been using the metal tank and filling to capacity, that could be the answer. I was just concerned that the diameter of the coil was causing the dry hits, but it definitely could be that I filled it until the fluid was at the top of the fill hole. I will try filling it with 4mls instead of 5 and see if that makes a difference.