You are close, look around, try to find arm connecting to pin. Like a little tiny universal joint in the center of the two yolks, when one of the pins pops out, it doesnt let the yolks center properly. Its hard to see, keep staring at it as you move the gimbal, then look at the other side as you move it. for sure you'll need a small screwdriver to jam it back in. Theres alot going on in there, so its kinda confusing, but onece you fix it once, its not so bad.

Ted