You don't need to add +10 for an authomatic succes, drinking 3 grogs have the same effect (unless you manage a magic way to roll less than 1 in a die)
...and if your gnome do not faint after such a feat, then he deserves a medal!
For the best example, I guess I should have said grog + grog + toolbox which will give you +9. Also, the toolbox gives you a +3 and the option to fix the engine, O2 pumps, or reactor.
Then right after that, coffee! You will have an automatic success with no faint check if your gnome started the turn with no intoxication.
Note, there is only one coffee item in the game