After 4 years, I finally performed a mixer test on my 21m Speed 5. Not that it did not fly good, but I thought I would check the lengths. What I found was that B & C were about 1 to 1.5 cm shorter than A/Z when doing the mixer test and symmetrical (right and left side the same). I am thinking that the profile of the kite would be somewhat flatter with B & C shorter, but I may be wrong.
So I adjusted them back to zero (making them even with A/Z). I flew the kite yesterday in light winds (11-13 knots) and it performed basically the same as before, except that the 'sweet spot' is just a bit more with the bar out (around 3-5cm). I usually fly the kite with the trim strap pulled all the way in and the kite flies mostly on the front lines. And as always the trailing edge bridle lines are pretty slack when at speed (both before and after the mixer adjustment).
Any thoughts or insight on this? Just leave the mixer as is or change it back to B & C shorter? Check bridle segment lengths? Thanks in advance!