I agree 100% to have your reels with MATCHING amounts of line and be filled the same. You want the same amount of leader, lead core, and backer.
What I don’t agree with is having them “CALIBRATED”. As an example to read 100′ if you have exactly 100′ of line out. That is irrelevant and inaccurate at anything other than 100′, because of the leadcores thickness.
Calibrating is most useful in long lining with braid or mono while using the Trollers Bible. It’s only accurate with thinner lines, which don’t change the diameter of your spool as much while paying in or paying out line.
What matters with leadcore is being able to duplicate and replicate. If a fish hit a shad rap with 137′ on the clicker, put your other rod at 137′ on the clicker.
It doesn’t matter if in reality that you might have 129′ of actual line out……
Matching and Calibrating are completely different things.
And cute little charts are just a base to start from. Your lure, leader length, the angle of your rod, current, reel model and size, and whether or not you are clipping on a board (it’s like having your rod tip at the water) are big factors that throw the chart out the window.