So I have a neko girl that has a long cat tail, it has shapekeys for tail up, tail left, tail right, etc.

I wanted to go into blender and move the actual position of the tail on the model because it looks a bit off...how exactly can I do this without completely fucking up all the shape keys and still having them work correctly? Simply moving the tail in edit mode produced really weird results (the shapekeys basically "reset" the tail to it's original position when I hit the emote in-game so it flies off to it's old position, looks really bad)