Don't think the line diameter that big an issue to match up with all the dive charts.Even though have lines calibrated,not even sure how much better it helps me catch better.Unless one rod way off,like 10ft different than others at 100ft.When starting to troll we try and spread depths out to cover water column,then when start catching,changing other rods to the depth that are producing.Now lets say my #2 tadpole is catching well at 45 and I change over my other 3 rods to get same depth.I may put another at 45 on opposite side of boat and the other 2 at 47 and 43.I have found that the difference of 1ft of depth doesn't really catch better than another.That one foot difference is about same as the line diameter gives you, or if your reels are not calibrated.Maybe for tournament fishing for bigger fish it does,but we don't fish for money.