hyzakite

Kent says on the bottom verticals, there is already one vertical bottoms on each side of the 1.5, so it sounds like just 2 more stack lines to cover the remaining of a supersonic's extra 2 bottom verticals. Nothing mentioned about the extra 2 top verticals on the supersonic. I would think 4 extra lines also, but I won't stack supersonics.

It may take an hour or so to untangle your lines but they will separate, just take your time and do one line at a time and set it aside until you have the 4 lines next to each other, pair them off with a handful of screwdrivers then back on your handles and winder. Check out the line management video and this will probably be your last tangled mess. I don't use the figure 8 wrap on the quad sets, just a straight wrap.

What do you mean by tangles? Like a spaghetti mess? You're not SOL, just need to take your time to separate all 4 lines and start all over. Sounds like way to early to be thinking 1.5b pro's,  they'll crash and burn just as easy as the exp only with a higher price tag involved. Check out the video on line management, maybe you started out wrong, with your line set.

How to get them out of the leading edge? Hahaha! there's even a training vid on that subject! By slightly bending the rod at the same time you are pulling them out they tend to stay together, put 2 rods together outside of the kite then take them apart by pulling them straight apart, it's easy, now put them together and try pulling them apart by grabbing the far ends of each rod and bending the rods slightly, not so easy to come apart, right?

I would say the LE material is basically the same, it may differ with the year the kite was made, just like the colors change with the material they are buying at the time. I can't see too much stretching of mylar with those bungee cords. My rods stick out about a 1/2 to an inch on each side being that the LE is cut at an angle. I haven't flown this supersonic, maybe mine will bunch up too.