Nut starter
Use 4:1 glue lined heat shrink to make nut starters.
You can make these to accommodate 1 or 2 nuts as seen in the images below.
Make a nut starter tool sized M3, M2, 2-56, etc. ahead of time so they are ready to use when they are needed.
Edit.
Just tried 2:1 regular heat shrink (no glue).
This works quite well; you need a 3/16” pre-shrunk diameter to get a final rigid tool for M2 nuts.
M2 not 2M 
BTW, when finished using the driver, leave nuts in the tool, prevents the end from flattening.
