Try this....
Disconnect the Actuator at the Dish and "carefully" flop the Dish to 1 side. Make sure the Actuator is out of the way!!!! Don't let it fall!!!!
String the Dish where the Panels are joined tie string tight. Then use 2 pieces of small string, and string the back of the Dish, tape the string in the grooves where the panels meet, so that the string forms a Cross in the hole of the center plate. Make sense so far?
Now, from behind the Dish, look thru the Center Plate.
Is the Feedhorn in the "crosshairs" of the 2 sets of strings?
Even pop the feed Cap off for a better view.
I have also had good luck removing the Mesh and rolling the kinks out.
I think it's anything over a 1/4" that make a difference for Ku.
I use a small putty knife to ease open the channel, both sides and the rim, and slide the mesh out.
Slide it toward the center first, so it can clear the rim, then out.
It takes patients to reinstall, but gets easier once you get the hang of it.
Some suggested that when reinstalling the Mesh, flip it over.