I'm a little different than some in that I just use the 6lb floro straight from spool through to fly.

I have absolutely no doubt whatsoever that is strong enough to land any smallmouth that I would ever have on.

That being said, the one area where I do have some doubt is whether the braid affects the action of the fly as you twitch it on the surface.

I don't think casting is an issue for me. I can already throw it far enough where the bobber is hard enough to see anyway.