I have a redington redfly 12'6" 7/8 with a WC 8/9/10 tips line. I want to get a second line with a longer belly for when I don't want to strip and shoot line. If possible, I want to use the sink tips from the WC on the longer bellied line so that I can just cast and swing. Any suggestions on line types, line weights, and where to cut the line so that tips can be used? Is there a way to find out what just the sink tips weigh so that I can cut the right amounts of grain weight off the new line? I would like to use it in the 40'-80' cast range. Is there a line that would even fit this description? Maybe a SA Spey 8/9 or Delta Long 8/9 cut back? I don't want to get a new reel so I'm hoping I can find a line that will fit on a Cortland 140 Magnum and still hold a bit of backing. Thanks for any thoughts.