I would have thought they'd address that by having a movable stand/holder for the part - so they could easily spin/tip it around while keeping it in the optimum

I would have thought they'd address that by having a movable stand/holder for the part - so they could easily spin/tip it around while keeping it in the optimum place for viewing (rather than moving your head/eye around to look at the right place). Of course I know nothing about any of this, but it seems like it would be easier for the user. Maybe I'm missing something about the hands not being available for that movement (pedals then?). Just interesting to think about.