Mark,
I appreciate your comments and no, I am not looking for perfect guiding.? What is the saying...The perfect is the enemy of the good.? I did have one thought; could the camera fan, if it is out of balance cause the problems I am experiencing?? I seem to remember hearing that some 2600MM cameras had fan vibration problems.? If that is possible I can swap cameras and see if there is a difference in the guiding.? What do you think?
Old...getting old is a drag but it beats the alternative.? I'm there too.