More knowledge for my brains to soak up ... went to the river to meddle with my crossover bar and learned some stuff. Poor Rebble had a hard time though!
What you depower at the bar is like 2x what the rear lines move cos of the pulleys ... so basically, you can easily cover the full throw of even long handles (sheeted out to sheeted in ie. brakes full off to full on) with about 440mm of depower. You probably don't need all that though as you probably don't want to be able to totally stall the kite on the bar unless you trim for it eg. landing. IMHO pulling the bar all the way in should just tweak the brakes so you get the boost ...
The center pulley line needs at least 1/2 the length of the bar (aka the amount used in a turn) per side, below the knots. So for a 60cm bar the total length for that line should be like 70cm minimum, plus knots
Small knots at the ends of the leaders don't get tangled around the lines in loops.
Trim on each of the rear lines is a nice idea but fiddly in practice. Above the bar trim means that safety has to go but it'll be cleaner ...
A nice & pretty self-landing line creates too much drag IMO although using it for a chicken loop safety works nice, but don't trust the Wipika leash. And the Airush red handle pulled right off ...!
Probably - setting the rear lines so the pulley is lower than center will increase the amount of travel up and down that line but be less likey to use it all up. I know what I mean, don't worry :)
... I need more leader line!
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