Rob and Eric, I understand and will do what you explained.
From the little I understood so far about eye pieces, 2" are more common among the more senior star gazers here at IIS.
That - and the possibility that I might enjoy visual observing, too, has put a Crayford focuser on the shopping list - which in turn would also determine the T-adaptor or T-ring for the camera, I guess.
So if it turns out to be this focuser issue as you have diagnosed, I would solve it by "buying stuff". *sobs*
Thanks!