Murphys Law and the real life...
I was told, the nuts are origin, so the wrench.
Today, I started the job (thx 2 all again), openend the bass, opened the bags with nuts and wrench and got stuck:
Nuts are different: smaller, silver colored, not brass as inside the bass. wrench is metrical 9mm and does not fit fine to the origin nuts of the bass.
So I tried to adjust the neck a little bit and that was the job for me for now.
Anyhow, all your info was helpfull for adjustment!
PS: found a fender pick with 0.4mm ;-)