A "quick zoom" button would make this so much more easier and less annoying for those small details.
I would say ideally you want this to be a toggle type button just like Ctrl/Alt/shift.
Hit (and hold) button, you get a X times zoom (3x, 4X ?) around the cursor. Release the button, you return to regular view. That basic zoom is already available in photo mode. So the principle is already there. Then the movement of the cursor also needs to be in this more detailed/finer mode.
Would be great for building at a distance (connecting belts mainly, because even close to the stackable pole. Hitting the right spot for a 10-12 stack high layer gets a bit tricky.
It would also mean a better quality experience when trying to snipe with the Rifle.