Hello Steven and the others, thanks for your comments!!
First of all i've tried most of all Brands like North, Slingi, Blade, JN, Liquid Force etc. for years.
I've checked my North Bar. It's works correct. All Lines have to be exactly the same length, when complete powered. This is similar to the 5th Line Bars from Naish, JN. All have the high Y. This is where the 5th Line is blocked.
Bars like from the Liquid Force HIFI and others have a deep Y or better a V.
I know that North, JN and Naish have the high Y exactly on the same Point, so you can change between Kites and Bars in this cases.
The Best GP flew worse because the Backlines are too long. So i made them shorter but the main fact ist that the setting of the Y is not on the right place. The best GP needs a shorter or longer Y, don't know?! Otherwise it won't have the performance like the original 2013 Best Bar.
So i need an exact Line Manual. For example the Backlines are xy cm shorter than the Backlines an the Y is yz cm from the end of the Frontlines.
It would help me so much!!
Would be great if you, Steven, can ask someone from the Best Team about the correct Line length!! Thanks a lot!°