The jet/mono with the motors out 1/2" from the original mounting points is amazing, for straight out speed. I'll do more testing for turns. With the power up it has a natural 15-20 degree climb. I accidentally seem to have solved the porpoising issue. I seem to have found a really good CG for the plane. I have to fly it more to see if what I found is true. For example I need to get in a high glide. But, it glides well indoors. I'll have to reinforce the airframe before I try the high glide test. The extended tail may have worked, but I didn't think to properly counterbalance it. I used a product called poster tack to balance the plane with the shorter tail(1/4" shorter). I'll post a pic shortly. Tim