Really strange. After replying to nukkenfutz this morning, I have just come back in from flying and my tricopter is all over the place. I don't understand as it was flying quite smooth the last time I flew (with nukkenfutz). Now, the power to the front two motors is all over the place and no matter what I do with the trim on the TX, I get it up in the air and then it all changes. COG is perfect. Flying today was a real chore just trying to keep everything in the air. I am going to play with the adjustments on the pots (running HK KK board with 1.6 fw) and double check everything and see if I can work it all out.