Quite along time ago I got a Genesis. Expecting something better than the Adam, and more refined than the Aurora, it was neither . In shape and flight it promised something similar to the pulse2. Well it was somewhat like it, but there were problems. Well first it had a slight tendency to one side, easy enough to fix and most foils have this problem, a few pleats and that was that. The second problem, it had absolutely no tension on Z in flight, the bridle itself was a bit weird looking drooping in the sky. The result of no Z is no power and no turning :-/ not too good. Well the fix would seem obvious? shorten Z. Well the third problem, a little bit of Z tension and the kite is suddenly very unstable, which is not too unusual but also the bridles were applying tension very strangely to the kite.
To fix it was two parts, the first was surprisingly quick and took me about 15-30mins! I saw the C bridle was already tensioned nicely so I decided to copy it. I stuck both the center Z and C attachments at the kite on a hook. I tensioned both the C and Z main on one side off this hook and tied a loop in them so they were even. I swapped the loop onto the hook so I could compare C to Z on the one side. The middle bridles were my base so they already matched. What I found was interesting to say the least. In a "normal" kite the bridle should cascade longest in the middle to shortest at the tip. Well the Z on this genesis went long short long short long etc :-/ No wonder it looked weird. I wondered then that this couldn't have possibly been designed like that??? it must be some f*** up with the wrong bridles being put in the wrong place. Jesus. Well to that I have no answer yet and may never, HAHA. So I fix it. With some cheap Chinese(we are getting a theme now ) 130lb dyneema fishing line, I made extension by extension, loops with one figure eight knot like the LCLs, and just hand tuned the knot so C and Z matched. For the bridles that were too long well amazingly a simple overhand knot on the sewn ends fixed them. After doing one side of Z I untied the CZ mains and tied both Z mains together so they were even and copied the changes from left to right. It sounds really long and complicated but I never touch a measuring tape and it really did take about 15mins! The second part of this Z fix is even more interesting. I had to adjust the mixer. Well previously I had added an adjustment to C, I was playing with this and actually moved it much back to original but it still extending C about an inch. I have developed an interesting theory about B and C tension, but back to Z, I start using a figure 8 loop tied in the Z mains to shorten them, 1,2,3,5 finally about 6.5 inches in the loop, so the Z main is shortened about 13inches! WTF! any way the kite flys great now, stable, turns nice, buckets of pull! Impressed I think it's better than the pulse2.The kite actually kinks on the rear like with a WAC but no WAC is used. Well I thought what the hell I'll take another 6 inches out of the Z main, ok ok now it's unstable like before HAHA, I take that adjustment out .
Now my theory about B and C. Well a while ago I tried some mixer mods that tensioned B and C evenly. What I observed is that B and C even is not very stable at all. B itself is actually very good at stabilizing the kite while not producing much power, well not as much as C or Z does. So I think what you want in a mixer setup is to tension B a lot before you touch C or Z. Basically by doing that you can then transition into a higher camber profile with Z starting to tension almost at the same time as C. You can do this while still maintaining stability in the large A/B transition state.
As to the specifics about the genesis and how I have the Z bridle shaped, well even tension seems great for producing power but not the best for turning. It's more common for foils to put more curve in Z so the tips are more tensioned and the turning better. It would be easy enough to shorten the tips a bit more on my genesis but I really like it like it is now. I think the way it tensions the Z bridle has more in common with some race foils. I think over tensioning the tips destabilizes them as well, making it much harder to achieve high camber states. I wonder now if I flatten some of the Z's on my other kites, fore going some turning for more performance.