I love my 17m 2010 zephyr as I use my 135 laluz
As my main ride, any winds under 12 knots in Broome is not worth it. A nugget directional does okay in 10-11 knots.
I've also taken the zephyr out in 17 to 20 knots while cyclone rusty was crashing into port headland, gotta remember I'm only 65kg another kiter at similar weight was powering on the 11.5 C4, at that time I was timid on boosting a 2 meter jump landed me 10 to 20 meters down wind when I got on the beach I was tippy toeing back to land the kite. Before that happen though I did a stupid thing I thought if gently pull the flagging line in a fraction to take the power out of the kite, that worked (kite basically fell out the sky) then **** hit the fan when it decided to to flare out and I was up and away and then sliding on my arse for a bit
But other then that it was a awesome experience and learnt what my maximum wind is for a Zephyr with my built