Those flat wrap winder handles really aren't that good, as it is critical that your lines be evenly matched. You just get as many wrist straps as you have linesets, the wrist straps are cheap, at least compared to the lines. The lines that come with the Quantum are 85', I believe, and should be fine in most situations for that kite. 50' lines might help you fly it in a lighter wind, but the Quantum isn't really going to fly very well in winds under 5 mph, no matter what you do. Like the Nexus, it's a heavy, durable kite.