Originally Posted by David William White
Maybe it's just my 'practical' sense, but I wouldn't worry at all about vertical alignment. It's the horizontal coincidence that gives you the range.
Theoretically that's right in a sense, but focusing is easier when there is no vertical misalignment. The absence of a double image is easier to detect accurately.
From what I see you saying it has been calibrated by a repair shop n it is still out of alignment?
Did you check the film plane vs the viewfinder? Do you wear glasses? Do you need reading glasses?
It sounds more like you need a diopter, not a calibration.
The repair shop would have calibrated it on a collimeter and that should be spot on as well as coinside with the film plane focus. If it is still out then user error is suspected.
Anyone can make a Digital print, but only a photographer can make a photograph.