thanks for the replies...
any other bars apart from the F-one .... ?
I ride 7m 2012 obsession on a 2013 Slingshot bar 27m lines works fine. Its got a long throw which kills 90 percent of power, the quick release is to a single front line which works fine.
The kook proof connectors are oposite, so you end up loop to loop and knot to knot, so you need some reverse pig tails. I made some out of old line, it took five minutes and cost zero pounds.
At max depower the under bar depower line can swing around and up over the bar. If this ever got tangled it'd be scary as shit, so i tuck the line under my spreader bar. It could do with a magnet in it or something.