Thanks guys -

Had 'er up on the stand last night and yes indeed, there was a spoke on the back wheel non-derailleur side that was pretty much just hanging there. I tightened it up and after about 20 minutes screwing around getting the wheel back in true the whole thing ran smooth and silent, as it should. I hate a noisy bike. So I learned how to fix a ping and what a dork disc is. Pretty successful all around. Regards,

Bob