The shifting on the Reno (rear cassette) seemed a bit slow and clunky, so decided to dive in and see what the problem might have been. Acted like a "gunked up" cable, but wasn't. Turned out to be that the bolt which holds the rear derailleur hanger was just a bit loose. So now that's fixed, but still can't ride it- must have bent just the wrong way while working on it, now it's a trip to the chiro to free my back up! Wish I could fix backs like I fix bikes!