I followed the advice I received from Lucid last night and now the pulley rotates without wobbling. Had to use a hammer to remove the pulley. I read some of the posts that said to line up the slot in the pulley with the "nib" in the crank sprocket and rotate the pulley until you feel it seat on the nib of the crank sprocket. No way could I twist pulley - I needed to hammer it into place - lucky first try it seated correctly. Should I have put some grease or other lubricant in the center of the pulley so I could rotate it into position instead of hammering into place?