FWIW ;
I have a life albeit a very busy one
.
I'm a Journeyman Mechanic so I like to keep things in good order , this $ave$ lots of $ in the long run , makes working on your old vehicles nicer and easier too .
I tried my hand at rebuilding my own turbo charger and it worked out fine and works *much* better now .
I am not sure about your other questions other than to say that piece shouldn't move , ever .