Aaaah, you found my thread!
Some of the tools in my own repair-kit are:
- Torch. A small, bright one. Useful for peeking into caps & barrels.
- Nail-file. For filing/hacking away at dry sac and for smoothing section-nipples.
- Small sharp knife (pocket-knife?) for cutting away at dried sac.
- Tweezers. Must be long and thin and grabby. For removing...dried sac!

but also for removing (if necessary) pressure-bars. For some reason, I have three pairs of these!
- Scissors. Small pair.
These are all things you can find around the house, so they won't be hard to get.
You might also want a powerful loupe (magnifying-glass, used by jewellers). They're pretty cheap and they're great for checking out small things like nibs and cracks and whatever. I have a pair of loups, one 20x, one 10x.