Bteel, to answer your question about heft and carryability of the CRKT KFF...
Yes, the knife is pretty heavy to carry clipped to the pocket, but I've found that you can get used to the heft. However, it DOES take a little time to get used to carrying it around very often.
Still, once you take it out and hold it in your hand opened, you really appreciate its heftiness. It feels extremely solid and definitely increases your confidence in this knife as a weapon. Plus, I don't find its heftiness to affect its effectiveness and speed in doing slashing and thrusting motions. Rather, it feels just as solid as a hefty fixed bladed, 5" plus tactical knife would feel.
I definitely recommend in getting this knife as a tactical solution. However, as I said, it takes a little getting used to the heft. Oh, and watch out for the minor rust spots that appear due to the bead blast finish. Be sure to wipe the blade as soon as you receive it with a rust-prevention product.
Good luck!
-Flood
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-It is pitch black. You are likely to be eaten by a Grue.