I got a slight vibration in my clutch pedal ican feel. I left my transmission rubber inserts that go on the side of the mount off just because I misplaced them while going back together with the clutch install. Would that be the problem with my vibration or do you guys not run the little rubber side mount

 

Eliminating rubber bushings always lead to higher vibrations. They are there to dampen those vibrations. But just to be clear, which rubber mount did you not install? do you have a pic or a link to a similar one?