hmmm...of course I don't have my manual at hand right now, I'm not sure if it would give a service limit or not ....but when you say it "rocks a bit"...just how much?...mine was really bad!, my buddy practically pissed himself laughing when he saw how wobbly it was.
Looks like Rocky Mtn has em for $80.....I know you said you're at your limit, but it would be worth getting one if it's bad, especially since you've gone this far ....maybe someone on here has one in decent shape they can hook you up with.