I am working on a LHT with 9sp bar end shifter and having trouble with the cable adjustment. New chain, new cassette, new Gore Ride On sealed cable. I get the adjustment good in the repair stand but then it skips in the smaller three cogs when it is ridden. Readjust, works good for a little while and then does the same thing again. I am going to remove the cable and make sure all the ends are seated and square. I have checked the derailleur hanger and it seems fine. any ideas?