ncik "bob miller" had T foils on his "Venom" 18teen well before he changed his name to Ben Lexcen

v you assuming incorrectly.
the I14, Cherubs, Moths .. The I 14s had t foils that Bieker used to lengthen the wave and "trick the water to believe the hull was 16 rather than 14 foot.. Semi worked.

Since then the hulls have become very fine in the bow. So longitudinal stability has been compromised. The main purpose of the Cherub, moth foils is to stop nosediving.. The latest I14s have the same issue.. But with the kite skiffs when the kite is up there should be an upward force if the kite is well designed. What they do have is the ability to help uphill by keeping the bow down uphill by slight modification of the angle..

Size of the foils.. width the the transom of the hulls in general in skiffs..