I have noticed in the past several flights that my 2-axis gimbal's roll has been shaky. I checked Radian gains, balance, and all the regular stuff. I also noticed that the roll servo appeared to be slightly bent, meaning that the pulley was not perfectly parallel to the large wheel. So I figured that I had bent something on one of my rougher landings. I almost went ahead and ordered a new servo, but this morning I checked the play, and realized that the hex screw that holds on the pulley was loose. Not only a little. But at least a full 360° turn loose. Oy. Just flew in a really stiff wind, and it's way more stable. Sigh.