On the second part your exactly right I should-a made my foils bigger in order to be able to work in the typical conditions we have in this area, 5-7 mph winds 10 months out of the year, with the boat I have (Hobie Tandem Island).
I haven't given up though, I'm still working on my goal, and have been busy the last couple years since building those foils to come up with designs that do work (mostly wing sails, ...
I "Like" it !!!!!
I got a project to plug my prosthetic(s) directly into the hydrofoil pylon, then
use my Kite-board kite to pull me, with No board between. I want to control the AOA of
the front wing by bending my front Knee , and make the body to the tail fin about
twice as long as they use on current weight-shift models for kite-boarding. Twisting
my rear foot can do the rudder ; got Good control on those functions when
i got my knee-braces on, (no slop) to the fake foot.
Speed range 8 or 10mph to 30+ but not a bunch more so it won't hurt when i fall.
Any suggestions for a foil-airfoil ; i weigh 210lb so won't need a lot of aria.