I've got 2 sets of hollow core doors whose upper brackets slip and therefore don't allow the slide-by doors to slide along the tracks & properly open and close. The doors rub against one another scraping the finish off the door. Only the edges of the doors are not hollow where the brackets are screwed into; however they evidently are stripped and don't allow me to securely tighten the brackets. Short of buying new doors, how does one reattach the brackets to the doors?

I have an old Acorn-Dorwal aluminum patio sliding door that I need to replace the rubber seal in between the aluminum frame and the glass (right where the insulated glass meets the aluminum frame in the sliding door). There are 4 screws (one in each corner of the frame) that I would think hold everything together. However I tried taking apart the horizontal and vertical frame pieces with the screws out but they don't budge. Is there some trick to this? Or is it just that the Aluminum is tough to take apart with the rubber seal in there? Any help here is appreciated. The door is heavy as a you know what so I would rather not have to lug it to a glass shop. Thanks