Eventide arranged for a check by the local distributor. To make it easier I drove over to them, they looked at the machine and didn’t see anything wrong so they just dropped the voltage to the fan to about 7.5v from 12v if I remember correctly whicgh made it quite a bit softer and then put rubbers between the fan on the stands…like a rubber washer. Anyways I think just slowing the fan made the biggest difference and I’m happy now