I built mine per the plans. I used a Foam wing and frankly it is a porker. Despite that, the plane started out with a ST 46 which had plenty of power, but I was not able to carry enough fuel. It went on the wall and then I got an LA 46 which was able to fly it equally as well and I had more fuel economy. The plane seems to require about 1 1/2 ounces of tailweight. Now remember, mine was and is a porker. Don't ask me what it weighs as I built in in 1993. I had Jack sign it for me and it is a prized possession and if it hangs on the wall the duration of my life that will be fine for me. It is a cool looking airplane. I hope to post a picture here in the near future. Mine seemed to have a strange wiggle to it. Meaning that when it came out of a hard corner, the tail would wiggle in and out of the circle. Maybe that was due to the leadout/bellcrank location, I don't know for sure. I built it without adjustable controls, exactly like the plans. I would like to hear more about what Ed Ruane was saying about the setup he would use with the Sea Vixon.