I am having an issue where the tricopter drifts in one direction. I trim that out and it flies ok for about 5 secs. Then it will start to drift again that direction. Again trim it out and the same happens. Until full trim is reached. Also, it will be one direction one time a different direction the next. Or it will actively change during flight. I had mentioned this before in a different thread. It was suggested to me to check my balance. With measuring I have the center of gravity about where the buttons are on the kk board on a batbone frame. I am for the most part balanced. I also have a non slip spot for my battery so my battery can not longer shift during flight. I also have a smaller battery. I have had a lot of flights without this issue. Then I had a crash that damaged my yaw mechanism that flitetest sells. I have a new yaw mechanism that works great. I don't know why I am having this drift problem. I have a friend that keeps saying it's my p and I gain. But like I said I had 10 successful flights and no drifting issue. What could have started this problem Can I solve it? I already have a new board coming.