Re: 2 note tuplet
Print preview shows a terminal weakness in this approach! The problem is that invisible items take up no space when printed so the two will inevitably move over the next note.
True for NWC2. The price you pay for invisble items taking up zero space. NWC 1.75 gets it a bit closer.
You could make the rest visible and massively offset downwards
In tight spacing, this will put too much space between the notes. Whether the rest will center in the beam will depend on accidentals and the contents of other staves.
or simply align the text left on the first note with space padding.
Which will require adjustment if the layout changes. This is how I usually do it, but it is inadequate.
The duple is much harder than other tuplets because the beam is so short. Even small deviations from center are quite noticable.