well - 987 going into Walter's monday morning to sit while they come up with reasons why there is no vibration 
 
 
incidently, i throughout the idea of the control spring for the oil relief valve as a culprit and the service rider was clueless!  who knows - will provide updates next week.
by the way - re: loaner car - Angie, the service rider confirmed when I made the appt today, that I'd have a loaner car ready monday morning when I drop my car off - no charge, unless I upgrade to the MB.