You only need one or two knots on the bottom leaders. Having two about 1/4" or 3/8" apart will allow adjustment for flying lines that have become unequal in length. You should have seven or eight knots on the top leaders spaced 1/2", 5/8", or 3/4" apart based on personal preference, which you probably haven't developed yet, so I would recommend 5/8". Search "leaders" on the main page and look at the varieties that are posted, or just spend a couple of bucks and buy a set from John Barresi on this forum. They're very affordable and well-made and worth the savings in time. You will develop your own preferences with time, and they'll be very close to the ones made by the "pro".