Goblin engineering is about practical uses for high profit and higher explosive power! Our schemata allow us to make powerful bombs and mighty weaponry; the manual you read covered this. The manual also covered our ages old oath of secrecy on our schemata. Once you become a goblin engineer, that's that. There is no access to gnome engineering at all. If you still want to become a goblin engineer, sign this document pledging life-long secrecy and speak with me again. Think about it carefully, adventurer.