After reading all the replies, and as it seams all things make a glide vibrate, I have to ask what fixed your vibration issue Rock?
After all the good info shared from your original vibration thread, I have to guess alignment of the front motor mount, but alas I am not a trained HD mechanic nor do I want to be. I have turned all the wrenches on mine to date, and am considering doing the tensioners myself.
Don't call me cheap. Call me frugal!
aka BOB