Ray, as I think I mentioned before, hard tiles are perhaps worse inducers of vibration than you think. They are totally rigid and incapable of absorbing any vibration and thus dampening it. I think that the same basic notion is at play even when using a strong tripod which fails to have sufficient mass to stop the shakes before they happen. And we havenīt even touched on the kind of feet the tripod may have.
Maybe thatīs the secret behind the old Gitzos which are damn uncomfortable for even healthy people to cart around; perhaps they work better than lighter carbon fibre Gitzos? Who will ever test them, and on which brand of perfect camera? Impossible, of course, all cameras and exposure systems are flawed when movement is required to make that exposure; it is simply a matter of acceptable degree.