As a temporary fix only, shimming the gap between the rotor and the shaft will move the tip AWAY from the cap contacts a few thousandths of an inch, and also stabilize the wobble. Shade tree fixes are usually more effective than some folks think.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!