Anyone here own a FS or FE series VAIO?

I am looking for someone who can tell me how to fix the left side of my keyboard, it has some pretty noticeable and annoying flex. From time to time, more often than not, I can hear this very hollow sound of the keyboard pounding against the metal under it when those keys are pressed. I popped off the keyboard and noticed that the reason why the left side is bad for that but the centre and right side are extremely solid, 100% flex free is because the optical drive with the metal (let me add very flexy and springy) casing is on the left side. It has a hole cut in the middle of the metal casing of the opt. drive with about a 1-2mm dip down.

I have tried masking tape in that hole, to level it with the rest of the laptop, and ironically it makes the hollow sound worse (very very noticeable). I tried double stick tape, same thing, worse! So what can I do? This has become very annoying and I would like to tighten up this left side somehow. There has to be a way.