To use or not to use

Instead of hooking it under the main dust shield, why not turn it around and mount it to the outside of the larger shield! Just took apart a trans from an engine and the cover was on backwards, that's what gave me the idea!

You are talking about the little inspection plate, aren't you? If you're talking about the large dust shield you should surely run with that, and the inspection cover also!! It's down there, under the car picking up road debris that you surely don't want going into your rotating assembly!! Geof