I have a friend who just bought a ONE 4wt and put the F1 on the rod. Looks very nice and he can afford it. However I did notice the reel/rod was a little more heavy than I expected. It does balance his rod OK, put still a little butt heavy I think. I gave him my Zenith 4wt and 2000CC Ul and he kinda looked stunned for a minute. I, IMHO, don't see the need for that much reel for a 4wt. but he has the funds so he bought it.