http://www.wowhead.com/achievement=9527
I tried submitting a ticket but their system seems to be down, so, I'm wondering if I'm being incredibly dense or I broke it.
I made an enchanting building first, then demolished it for the Goblin Workshop. Now, I don't remember if I went to the goblin workshop when it was level one or went straight to level 2 with it (i imagine i probably went into it, you do have to finalise it after all). Upon searching for how to upgrade it to level 3 though, I find out I was supposed to have been given a quest to unlock the inventions at the workshop, but I've not been given that quest and can't find any of the inventions anywhere, so look completely unable to unlock the third tier of the building.
I'm just wondering if anyone else has had this issue and how to fix it (aside from ticketing, which i can't do right now), the only other solution I can think of is destroy the building for another small one, then rebuild the engineering works and (hopefully) grab the quest from the level 1 building. Something I'd rather now do, it would take a few hours and a bunch of resources I can't afford to waste.
TL:DR - can't get inventions, seems to be broken