Re: Scientific Angler System 2 reel questions
I've got both the 45L and the 56L. Yes, the 56L is designed for a 5 or 6 line, and has adequate capacity for those, but if you want to put a 4 on it with a little extra backing there's no reason not to.
They were one of the leading models of freshwater reels for many years and are very sturdy. The only thing you need to be careful of is keeping the exposed caliper brake clean. Don't let it get any sand or grit in it, or any lubricant on the brake pads.