I just noticed (car stationary) that the whole firewall flexes amazingly much around the steering rack mounting area when torque is exerted on the steering wheel. There's at least 6mm of movement left/right on the steering rack when the wheel is rotated CW/CCW, and before somebody asks, I see none of that coming from the rack bushes. On all newer cars the rack is attached to the same subframe as the track control arms, which is a far superior solution...

But, my question is, has anybody actually done anything to improve the rack/firewall rigidity?