Hi there.

I just bought a second Mana Generator off of Grunt's, but unlike the first one I can't seem to find it anywhere in the crafting menues and thus am unable to build / place it.

Any hints ?

Solved. The Mana Generator showed up in the crafting menue. I don't know, if I managed to constantly miss it before, or if it just took a while to finally pop in.

Can't mark my own answer as solution, though as it seems.