I have switched a couple of ball pythons to F/T by doing this: make sure the snake senses the smell of the mouse/rat before going in. The snake should be in feeding mode before you open the tub/enclosure. Your rodent should be warm and toasty, and then just go for the zombie dance. I usually do the dance in the front of the tub and then move closer to the snake. Hopefully the snake will bite and constrict, and when/if he do, they seem to like if you shake the rodent (when it is constricted) with a tong for like 2-3 seconds to make it become "alive". I stop doing this once they have eaten F/T about 5-6 times maybe.

This is the way I do it, it works for me and I'll be doing it when my killerbee arrives. Whatever technique you're using, keep us posted please