A Hillbilly method of cutting down on mirror vibration is to put stick on wheel weights on the mirror housing. Once you hit on the right weight, you can super glue the weights to the mirror. YMMV.
“many a trip continues long after movement in time and space have ceased”- Steinbeck, [I]"Travels with Charlie"
[FONT="Century Gothic"][I]Sometimes your only available transportation is a leap of faith[/I] [/FONT]