I just replaced a faulty servo in my Blade, and the tracking seems kinda off. I have the pitch as close as possible to 0 and 10 like the manual recommend. The tracking seems off at full throttle/collective when I have the skids clamped down to my workbench. Just for good measure, I replaced the feathering spindle with a new known good one. It tracks fine at about 75% throttle, but full throttle one blade will track higher. I've tried turning the ball joints 1/2 turn per blade which is the minimun adjustment, and it still won't perfectly track at WOT. Any ideas? Oh, these are flat bottoms.

you could try new blades, or it could be close enough. Or it could be a spindle, but I'd say if it tracks ok up to 75% throttle when clamped you are ok. In flight at higher throttles it will move up instead of bending the blade.