Guys, Joe was here testing all weekend and the Zippkit .21 O/B rigger is running great! We ran both a K&B and a O.S. and both engines ran very well. The boat corners very well and feels allot like my .21 Zippkit rigger. We did most of the prop testing with the O.S. engine and we are turning bigger props than I can pull with my .21 Vision Craft tunnel. It pulled a X447 with a bone stock O.S. This is telling me that the Zippkit rigger hull is running more free from the water than a tunnel. The speeds are probably a few MPH faster than my Vision Craft tunnel, more stable too, and less sensitive to setup. Tunnels can always be tricky with setup as far as engine angle and height. The Zippkit rigger doesn't much care. The rear sponsons only touch the water when going real slow or dead in the water and the boat sits higher when dead in the water than my inboard Zippkit rigger. The boat launches easy and you can slow down and speed up at will. It's going to be a great boat for beginners too.