I enjoyed your experience!,....
one comment, not a criticism in any way
When you launched the kite at the very beginning you "dragged the leading edge diagonally" from an inverted position. That is two string move and NOT what you are after at all with a quad! That's abrasion on your leading edge sleeve and wear on the bridle loops, even the end-caps! Remember, this kite design is all about one word, control.
You allow it to drag eventually going into forward flight on the side OR you make it back up. Practice the cartwheel until you DIAL it up to halfway point, balance there on the wing-tip (allowing your hands to go back to a neutral position, otherwise the kite also keeps right on going).
That is what I want you to practice, REVERSE & speed control. Add still more "down" in the tuning in big wind, then kite will not suddenly surge forward. Instead you "allow" it to go forward, like you were looking over the dashboard of your car, trying not to hit a critter with both feet stomped onto the brake pedal, inches only of progress being permitted.
I would stop you from flying one of my loaned kites until you mastered the cartwheel. Love to share, so you can appreciate how serious I feel this comment to be.
The quickest improvement of skills comes about with how SLOW you can fly the kite regardless of conditions.
The Speed series of wings will give you that rush if that is the ultimate objective. Control the 1.5 platform while learning and then you can accelerate to the Shockwave, supersonic or a Blast, basically TWICE as fast in forward and reverse. Best be ready for a huge increase of throttle sensitivity and pull. Speed series kites are not really a great low wind choice, but they are howling fun on a beach with wind.