An interesting commentary I've found at the video comparing Soul vs Hyperlink:
"A note about the Soul 12m (which I love riding) Was delivered to me and was either not tuned or rigged poorly from the factory. I tested against another Soul 12m and the difference was very noticeable. My new kite kept having the wingtips fold in and would completely collapse at times. Dragged me across the beach (injury). The other one was as stable as a stratus cloud. I returned the kite to my local shop and they would not replace. Said FS would doing nothing until it was sent to them in Germany (i'm in Australia)
. The kite shop owner flew the kite and agreed that there was a problem, he contacted FS and they said the would send me a "barely used 12m" to replace mine, or I would have to wait many weeks for them to receive mine, repair and return. Heads up for those looking to get this kite. Saying that when this kite works as advertised I can go from twin tip to foil to twin tip as the wind changes from 10kts to 18kts to 10 knots. Cheers"
So apparently buying a Soul is like playing a roulette, you never know what you'll get. Besides author of the video have mentioned that he had to tune his Soul as well. So did I have, equalizing the mixer, since it was off out of the bag.
If wind forecast remains, this saturday we will have 12-14 knots. I'll try to make another run for it and do a couple of stability experiments, filming them on my GoPro. Then I will decide, to blame it on the gusty winds, send the kite to Flysurfer, or to our local foil kites master to measure and tune it, which would cost the same as sending it to Germany, but way quicker.