Do your handles have pigtails comming out the rear of them where the power lines come out the front, if so, just use a peice of climbing rope, tie a
larks head on each end and larks head it to knots on the pigtails. If not, could always wrap the climbing rope around your handles a couple times, 1
pass over the flying line, 1 pass under, knot tightly. Should stay put.
As for measurements, it's different for everyone, you gotta go with what feels good to you, You can always shorten them if needed, You want to have
your hands out in a comfy position, when you push one handle out and pull the other in, you should have enough rope in the strop to allow you to
almost fully extend one arm. Too long and you'll have trouble flying off the side of the buggy, you'll really have to twist your body to reach, Too
short and you won't have enough steering. Also, if it's too long it'll tend to fall off the hook on the harness when you pull your hands in at all.
Sysmic S1 Buggy.
0.7m / 1.4m / 2.0m PKD Buster I
4.4m PKD Buster
10m JoJo RM+
6m Flysurfer Outlaw
12m Ozone Access