This is not the first thread that you posted about upgrading this bike’s shifting. At this point, I’m going to say go ahead and do it. Because you’re not going to be happy until you do. We’ve all told you all the adjustments and repairs that you can do. They will all have to be done on the new one, too. Get one that says 9 speed and has a barrel adjuster at the cable stop, some of them don’t.