Great post Pump me up. You're right about everything. I had a FS speed2 19 mts SA and its effective range was 8 to 12 knots with a door. I sold the first day it hit the water and then the beach sand and i had to activate the 5th line, what a mess with all that bridles¡¡¡
In flight the LEIs are infinitely better than the foils. Now I have a Dyno 18 with a range 8-18 knots with 85kg and I can't be happier with this kite.
Last summer I flew alongside a FS speed3 21 mts in 8-9knts and was so slow and boring and I don't think at all it had the same high end they say when the wind picked up lets say 5-6 knots more the Fs guy had to went out to the beach he was clearly over power with a 137x42 board.
By the way it's a pity that this becomes a leis vs foils thread.