We got together at the Versailles pond this weekend for a little battling and boat tests. I was able to get the PT 564 prototype on the water for some tests. It runs pretty good, however I'm having problems at full speed: the torque from the single prop rolls the boat over whenever it gets fully on plane. Using an X430 metal prop or a plastic 32mm racing prop, the boat runs great on 2 cells, just not quite on plane. On 3 cells it planes nicely, however if I take it above about 1/2 throttle it starts rolling over. I think my problems come from the narrow beam of the boat, which requires more speed to get on plane and has limited stability once it is on top of the water. I tried a smaller prop, both a 3/4" and 1" three blade brass prop, but while there was no torque problems there also wasn't enough thrust to get the boat on plane. I don't want to use trim tabs because I want the boat to be as stock as possible. Any one have any ideas how to solve this problem? Completed PT boat below, with the YOG 86 in the background. Below is a video of the PT boat with 2 cells. It runs pretty good, fast enough to be fun and stable enough that you can put the rudder all the way over without rolling the boat.