Addendum: my bottom leaders are generally about 5" long, with 1/2" knots.
I use these strictly to equalize R-L unbalance as I switch from line set to line set in a hurry.
All tuning (throttle/brake) is done on my top leaders.
Re tuning for newbies - the best approach I've found for folks trying to find their "feel" on the settings...
1 - Start with good, long top leaders (maybe 12" long with knots spaced 3/4").
2 - Let your top lines all the way out on the leaders, and try to launch.
3 - If you can't launch, pull in one top knot and try again.
3a - If you can't launch, pull in one top knot and try again.
3b - If you can't launch, pull in one top knot and try again.
3c - If you can't launch, pull in one top knot and try again.
Eventually, you should hit a knot where you are *just* able to launch - practice on that knot, and the knot on either side for a minimum of 45 minutes (takes a while for our physical technique to adapt and stick).
Every 3-4 months, repeat the same "seeking" process and I'll bet even money that your "happy launch" knot ends up further and further out each time.
Note, your "happy" setting may vary as you change kites (different bridle stretch or tying) and lines (top lines stretched more or less), don't get stuck on one setting - it's best to stay dynamic, testing and adjusting as needed.
Other posts in this same thread that may be useful in utilizing your new settings:
How to "whump" or load and unload your turns:
Relevant tutorials on KiteLife:Go to the full post