6 knots : like no wind, family is sitting in the sun, kids are playing in the Water. Not possible to fly 17m
8 knots: family still having fun. Kite is flying when active moving.
10knots going forth and back. Little jumps. Family still good.
12 knots. Family will put on Tshirt. Windy feeling on the beach , but family happy: Massive fun an action while kiting..(for me as an intermediate kiter.) best combination for happy father and family.
14 knots big jumping with hangtime. Family is putting on sweatshirt : not so happy
16 knots : I get my 12) family is preparing to leave beach.
22 knots : I get my 9, family not on the beach.
So also for me 6 knots windrange.
But these 12knot days are sooooo often here in summer.m
Just my opinion....
And yes 18m Soul would be even better....