I already removed my drive and retightened every screw. It's still loose on the left (facing the faceplate). Is there any way I can fix this? Secondly, why are the lens movable? Is it a manual adjustment or does the psp mechanically position the lens left and right when it needs to? Finally, what determines whether a battery cover will be tight or loose?

Edit: Btw, I replaced the door already to no avail. I isolated the problem to either the lcd tray's mounting or the drive's open/close mechanisms. I'm almost sure it's not the LCD tray since no matter how many times I remount it, the door i loose. Are there any springs or mechanisms I should tighten or modify on the drive?