What's the problem with it? Ohh, the unwinding is chewing up the safety line? It's just flying line, you can splice in a new section or just replace the whole lot real easy...
Switch bar would be a place to start.
Problem is, almost nothing for LEIs is going to be wider than 55cm. Cabrinha 1X Trimlite bars go up to 60cm but I don't know how much Cabrinha would bother you...?
Also would be pretty easy to replace the straps with a cleat, either a "racing" one (
https://www.ebay.com/itm/Clamcleat-Aero-Cleat-CL826-72-base-Black-Nylon-Junior-cleat/121889084839?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649) or a blocky one like Switch (
switchkites.com/regulator.html)
Benefit of the Switch one is you can adjust for depower throw; and the cleat, the sliding stopper and the C4 trim bracket costs less than US$30.
