Is the rudder counterbalance hitting the VS skin? That may require some trimming of the skin.
The thread pitch on those rod end bearings is 1/32", so just a half turn will give you 1/64" more or less. Get the top and bottom in and moving smoothly, then figure out where to set the middle one. You also may have to press on the forward edge where it is rolled to get the necessary shape that won't rub on the aft VS spar. Lots of springback in the rolling, so give it a good massage with the palm of your hands and make it into the shape required.