If you you like to spool braid on your walleye and salmon reels at home, here is a little trick to help you get the job done. An important factor in using linecounter reels is that you have the same amount of line on each reel. That way if you are using (for example) all crawler harnesses for your trolling spread and one rod continues to go off consistently you can adjust all the other reels to the same depth with confidence that they are going to be the same.
In my case I was spooling two reels up during the ballgame today, and I wanted to split a 300 yd spool of 40 lb Power Pro between them. Key here is to convert the number of yards you want to put on, to feet. So 150 yds, comes to 450 feet of braid.
Attach the braid to the spool with a piece of tape, set the counter to 000, start spooling until the counter reaches 550 ft on the counter. Then attach your mono backing, in this case I had a spool of 15 lb Big Game left over from last season. Use a double uni, or back to back uni knot to attach the two lines. The bigger the line that you use, the less you have to put on, thus its cheaper to do.
Once the line is attached, reset the counter back to the three zeroes and start reeling. Fill the spool the rest of the way with the monofilament and keep track on the counter when you have finished. Once you are done, fill your second reel by tying off the mono to the spool, and use the first reel as your filler spool.
Now, you go back and fill your first spool again. This time you know exactly how much mono to put on. When you reach that mark on the counter, attach the braid, and see how close you come to emptying out the spool of braid. You are either dead on, or will just have a few feet left over.