Thanks for the review.
I am interested in slowing down and riding the wave too. I bought a Chinese clone of a Takuma Concept V100. It is billed as the slowest easiest foil on the market. Got positive reviews from kiteforum members Gunnar B and JzPerth/James. First try behind the boat, my non foiling friend was up and flying 10 seconds into first try!
I haven't used it under a kite yet, but after a half dozen sup foil attempts I finally had a break through session yesterday, where I could get 10 second rides. It gets up on the foil with almost no speed, but it does require a bit of speed/power to stay up on foil (my mistake was being too cautious and going too slow). Will be fun at some point to see if it can ride wind swell on down winders.
On a different note, I saw a review of this massive wing today, gofoil maliko ... crazy yuge.