Why?! This doesnt make sense??

[peter]

Plus, some of the best bites happen when the float just tips over due to the weight being taken off the fly from a fish moving up and just holding it. I don't think you get that with a bobber stop, but maybe I'm wrong.

I don't think it wouldn't work at all, but I do think the Bob's bobber works BETTER than a slip float.

The strikes with fnf can be very light and fast (at least the time I went) Maybe the bobber goes down quick once and if you blink you missed. I blinked a lot. Don't know if you could get the jigling action on the bobber/fly with a fixed to the line with only a stop at the top. How would a hook set work on a bobber with a only a bobber stop on the top?

Bob Coan at Dale developed that specific bobber (Bob's Bobber) for the very light fly. Could he have used an off the shelf slip bobber I am sure he would have. He took me out once and it all made sense. The technique is simple to learn if you watch somebody do it and have the right rod, float, fly and you can pay attention to your line for hours in end.

You could try this:

http://www.fishin.com/forums2/showthread.php?t=91120