Good, that part restored full operation, so that's great. Yesterday I re-attached the bottom cover, mainly so I didn't have to store it or throw it out.
Yes: I did NOT try to reattach the cover screw that is obstructed by the hump - again !!! two screws hold that cover fine, no need to even put a 3rd $^*&%^#@%^&$# screw there where hump makes it tough to R&R, guess I could have ground shorter a 7mm socket for that one. Thanks, GM.