I have a question regarding the new fishing lines. I want to change all my old fishing line (both baitcast and spinning reels) to the new Berkley 100% Fluorocarbon line and I was told to add it only as a leader and not to fill the whole spool. Is this correct? Or I noticed the PowerPro by Spectra and wondering if I should add this to all my fishing reels (both baitcast and spinning) instead of Berkley 100% Fluorocarbon. I know I will probably get several different answers but I keep trying to get the same answer from the majority of people before I make my decision. Since these lines are expensive I don't want to try all combinations nor do I want 2 extra rods or spools for each reel. Help me !!!!