Mark,
I have not had any motor noise problems with my Nottingham Interspace TT, although the housing does clearly vibrate at standstill. I did find a slight deepening of bass and increased microdynamics by placing three mouse pads under the motor housing. As a suggestion, you might want to try this cheap tweak isolation ($3.00) to see if it reduces your motor noise problem.
I have not had any motor noise problems with my Nottingham Interspace TT, although the housing does clearly vibrate at standstill. I did find a slight deepening of bass and increased microdynamics by placing three mouse pads under the motor housing. As a suggestion, you might want to try this cheap tweak isolation ($3.00) to see if it reduces your motor noise problem.