Well, you OldnBroken must be one of those "bright" people who don't even realize if a kite is trimmed correctly or not. If you would know, you most likely wouldn't have sold your 10m LTD because you could not cope with it. If someone with a bit of knowledge (those .4% who are able to report problems and faults) would have helped you "Mr. Know-It-All" with the setup, you would still be a happy 10m LTD owner.
But I'm sure you don't even get this message...
I own three small businesses and you brew beer for somebody else, let's not measure who is bright and who is not.
I sold my S10 LTD kite because it was redundant, too many good kites in the middle range.
My 2011 Renegade 11M was/is still working nicely, next to a 2012 Evo 11M.
My 3G S10 ran beautifully, I knew it was totally right after fifteen minutes in the air, and it ran perfectly when I sold it.
I don't keep kites until they are thrashed, and I rarely lose a dime when I sell one, the S10 included.
Got two new 2012 Blade Prime C kites after that, to try them out, got one in a trade for a surfboard.
Lots of great kites in my magic shed!
In fact, the last North kite I bought and sold (in December) a 2012 Rebel 14M, I made $240 profit on it.
I bought two used North bars to use with that kite for $150 for the pair...sold one for $149 and one for $180.
So my Rebel 14M experiment this winter told me everything I wanted to know about that kite and made a profit of $420, which almost paid for my used Zephyr complete at $450, and I put the original money right back in my Paypal.
So, not only do I know my gear, I also know how to get it, use it and sell it, and not take a beating.
All this with a sixth grade edumacation.