I built my own pair of outriggers using skin on frame technique. They are V shaped and they don't steer my kayak for me. I'm using a double kayak, that may be an explanation also.
I'm busy finishing plans and DIY method if you'd like to try the same.
Now I'm more interested than before . . . it looks like you've effected what I'm recently in the dreaming stage about. I look forward to your further explication Romainpek