I have a 4550CF and a 4580CF.
The 4550CF is my go to lake reel attached to a Z-Axis 590. I have three spare spools for the 4550CF, one dry line, one medium sink, one midge tip and one fast sink.
I use the 4580CF on a 9'6" Winston 2 piece, my go to nymph rod for the Bow.
Great reels light, great drag system, did I mention light.... great for us old guys.
DanP