Replace

use 'chest lock creation' build lock from <material>

with

use 'chest lock creation' build symbol lock from <material>

and

use 'chest lock creation' build number lock from <material>

Don't you think that a locksmith with 100% skill who doesn't have have
slightest idea of what he's trying to do until it's done, or possibility to
affect outcome at all, is somewhat pathetic sight?

Yes, i know that merchant who tries to do anything at all is a pathetic sight.

And yes, i've made my titanium 1-slotter from a skeleton big enough to make
house of it so i know that sucks too, but at least in that case you know all
the time what you're trying to do.