I have 50 sized sceadu that has a problem tracking out after serrious 3d menouvers. It will track back in when I return back to normal mode and rpm's drop. I run about 1800 rpm in stunt mose and 1650 in normal. All seems to be free with linkages, and all servos are secure in their mounts. The only thing that I can see is that the washout is a little sloppy. Any sugestions?