Hey.. welcome to CEG..
Calm down!! deep breaths..
Try defining "vibration" at idle... felt throughout the entire car, or in the pedals, or steering wheel, or what?
does it go away at any certain RPM, or is it always there regardless of engine speed?
faster at a higher idle, or always the same speed?
The pressure plate, when in neutral, whouldn't "vibrate", nor cause "vibration"...
Give us more information, and a more detailed explanation of what kind of effects, sounds, or symptoms you are experiencing.
Include mileage, make, year, model, and any applicable mods, or repairs you've done recently..
Ray