Answers to you helpful questions

- I've tried moving the low limit screw but can't seem to find the correct setting. When shifted to either the 23 or 25 tooth gear - the jockey pulley looks to be in perfect vertical alignment. i've followed the Shimano recommended procedure

- I did not replace the short cable housing that enters the RD - the new cable moved smoothly thru it and both ends of it were still clean. Is there something more I could examine there?

- the torque and changing angles seems to me to be the most likely culprit but I don't know what more to examine and can't figure out how to duplicate the problem except on very steep roads. I check the crank bolt torque on a regular basis but will check the BB tightness.

- I'm not sure what more to do to prep the housing ends other than have clean cuts. I used Clark shifter cables and used the ferrules they supplied - what more can I examine in that area?

Thanks for the ideas