creating unique items

[Psientist]

aside from modding an existing unique artifact, has anybody figured out a way to make a unique (only one allowed in the game) magic item? Am I missing something blatantly obvious? I can't find it in the modding manuals or forums, and it seems like a fundamental crafting attribute.

[lch]

#constlevel of 8 or 12 makes an item unique. (12 makes it unforgeable as well)

[Psientist]

Simple as that!?! OK, I thought I might be missing something blatantly obvious - thanks!