Hello. I own a J170, factory built. I like the jab because you can fill it up and go a long way before worrying about fuel. They also have 600kg max take-off weight. Plenty of room for shoulders in the cabin. I flew mine from Bundaberg to Gawler, SA in two days, two POB, full tanks and lots of water, food, rubbish. The plane handled just great, even in stiff cross winds at Chinchilla. The only thing I don't like is they float on landing, it wants to keep flying! It's that big wing.