Don't have the answer, wish I did... one of mine did something similar after I cleaned it and lubed it. took it back apart, found nothing... put back together... no wobble, figgered it was some kind of alignment issue, as I had hauled it apart
I'll be interested if anyone comes up with this.. I'd like to know too!
I have no gripes with the slammer, love it.
Hope you get rid of the wobble.