W520 keyboard in W530?

[crystal castle]

Turns out it's not the xx20 series keyboard that's bulging, it's the W530 palmrest. Not sure why though. I can press down pretty far on top of the palmrest on the left side, about 1 inch the left of the wifi and disk lights on the lcd bezel. I don't see obstructions or missing screws. the whole right side of the palmrest has almost no give whatsoever, as it should be I think.

Edit:
It's definitely the bezel. It looks like I might be able to pull it back down with the right sized screw. I've got a screw in there now but it's too big so it's not pulling the palmrest down far enough. All it's doing is preventing flex, which I guess is a start. I had to cut all hole through the bottom cover under the battery just to get the screw in there. Very strange.