if you could get a hold of an Electronic Vibration Analyzer, this would be a lot simpler.. a few readings from the screen, some math and *bam!!* theres your answer. if you can find a Ford tech (i think any dealership should have one), see if he can get his hand on the EVA, theres a new one out now thats more advanced, i forget what its called..so im sure they wouldnt notice the old EVA missing for a day.
thats the way i would go about it if youve already ruled out the obvious
thats the way i would go about it if youve already ruled out the obvious