Try to loop or down loop a Sonic 1 or 2 18M and let see whats happening.
https://www.youtube.com/watch?v=RJxMwetXfw4&t=1s
https://www.youtube.com/watch?v=RJxMwetXfw4
This was my first ride on my friends Sonic 1 18M. I am 96 kg whithout the 7mm neoprene suit I had that time, and the wind could be 12-13 knots may be 14. My 86 kg friend was struggling a bit on a 15 M LF Envy at the back (on a 154x41 cm Crazyfly lightwind board) as you can see it on the video. Basicaly only the first jump is worth to see on the video as then the wind started to decrease to 10-12 knots. I am riding the Radical 5 L 138cm with my friend Sonic 1 18m.
The point is that this Sonic 1 18 m was not a slow turner but more importantly it generated a pretty consistent pull through the loop and due to its speed it generated way more power in the loop than any tube kite would do it so this was pretty exiting. Actually the power of the loop felt more like looping an 11 meter tube than the felt of downlooping a 18m in lightwind. The other kite in the video is a Flysurfer Boost 1 18m which is my kite and I like to loop it due to its tight turn radious but it generate much less power in the loop than the Sonic 1 18M. On the Video my friend is riding the Boost 1 18m who is some 94 kg on a 153x46cm lightwind board. (I write this data just for comparison)
Till now I was not a great fan on soft kites for the water (I am riding the Boost 18m, Boost 2 15m and Boost2 11m) but this experience was started make me thinking on a Sonic 2 18m.
I had one little tip tuck I guess (while it was my first ride ever on a Sonic) but it was much less than on my Speed 3 15m. Also due to its power this kite definitely takes more advanced kiter than a tube or a Speed series would require. But it gives way more height and hangtime, much better upwind than any 17 or 18m tube would deliver and much more power in the loops. Actually this was the best surpirise for me about this Sonic 18 m that it loops pretty nice, but you can see it on the video.