Chris
There is some movement from the engine (no more than I would expect) when you rev it but I haven't compared it with another cossie, so how much is too much ?
The problem is you can't see whats going on under the bonnet at full throttle when I get the vibration.
My vibration is also felt more through the floor and to the left hand side, it doesn't seem make any difference what revs just at full throttle.