I brought my rMBP to the Apple Store to get the screws tightened because it was creaking. The tech brought it to the back and came back with it. It helped a bit, but the creaking returned. I noticed that he stripped the screws a bit and one screw constantly snags on this woven bedspread I use. If i bring the rMBP in again to get the back plate reseated, could I also ask for replacement screws as well?