People act like aluminium is supposed to be as strong and light as titanium. Fact of the matter is, these decks are made of T-6 aluminium... Scooters aren't made to do what we do with them. No matter how many accessories or reinforcements we add to it. The more support you give it in one area, the less support it has all around it. I think it's about time to start making scooters in steel or chromoly. Go ahead, complain of the weight difference, but at least your scooter will last you longer than four months at a time.
If your deck is bending in that much from smith grinds, you're landing way too hard.