Harkening back to my consulting days, here's the answer first and if you want the saga, well it's still all there. The Sunroof was jamming due to some poor prior repairs including greased cables that were now full of hardened gunk. I needed to replace the cables also partly because the section by the drive gear had worn down (or stretched?). Somehow narrower at any rate. The driver's side rear drain was clogged, which had caused rust in the tube, and that required a replaceme