How on earth do you set your H and W trimpots "to spec"??? There are no markings on them, and like those on the focus block, they are very sensitive to ANY turning of them. Where is spec??? Where they came out of the box? Guess you could call it that, but I doubt that any of the Hitachi techs would, or do. I would not personally call the OOB settings for those trimpots "spec". Far from it. Each of those trimpots is fully
The best thing to do is to mark them very exactly OOB with a very thin
Sharpie pen before changing either of them, and use these settings as your baseline. Then at least you know where you started. But there is no "spec" here to start at. Only their OOB starting points.
If I were really being plagued by drift, I would go to each point, set it to its center position hor and vert'ly, and watch in solemn bliss at how that messes everything up.
Then I would do the H and W trimpots with the right pattern - remember, those trimpots affect ALL
scanrates, they are master controls - and set it up as close as possible before redoing any of the point positions themselves. I would aim for getting the centers of the edges right on the sizing, and let the corners take secondary standing. Then I would correct the corners properly, then move on to the rest of the pic.
This is obviously a dangerous set of moves,
and I would not do it unless you had LOADS of time on your hands, to make the kinds of corrections that might need to be made. As a family man, Michael, I know you don't. In fact I am amazed at how much time you and Leo have been able to put into your sets, given that you are both family men!
But yes, ideally I woulda not changed any of the point positions before altering the H and W trimpots - and going from there - if I were redoing my sizing in any way, shape or form. Always change the overall, Coarse
settings before changing the much more delicate Fine
See you in about a month...