Hey Pete,
The EVO hull was good. It was very stable. At the stern I'd rate it as stable as a punt. I used the thwarts as casting decks, and on the aft thwart I could walk from one edge of the boat to the other and it would hardly move. That was one up too, and I weigh nearly 100kg. You had to be a bit more careful at the front, because of the vee, but that was expected.
If you happen to stay out overnight, the rear seat is wide enough to sleep on. That is, I could lay across the boat on the thwart and sleep, but I'm only 178cm. A tall bloke wouldn't fit.
All of this stuff you can do in smooth water ie a river. In rough water you have to be sensible as usual. The EVO hull rode well, but it was not smoother than any other tinny I've been in. The big reversed chines help it to plane a bit easier, and maybe to hold the plane to a lower speed.
Overall I found it to be a nice, big comfortable tinny.
Cheers
Craig