The side panels are coreflute, real estate signs.
Have pictures of them in seebreeze in my profile. Not blokart parts like the sail, but I'm after speed. Take em off at a blokart event, put them back on as needed.
Its still a blokart and it hit 110 kph.
I have a aftermarket. sports exhaust on my Holden, still a Holden.
I'll leave to you guys to argue the details.
Lake Lefroy is made for high wind sailing, the windjet with Richard Jenkins used it for a crack at the world speed record. But for an untimely downpour he would have done it here.