Nostalrius Begins - Quality wow vanilla realm (1.12)

My engineering is at 281 and I picked Gnomish engineering. I can't find where to learn many of the high level engineering recipes that Goblins would learn from Nixx Sprocketspring in Gadgetzan. Is there a trainer somewhere else that trains 275+ engineering. I'm specifically looking to learn Dense Blasting Powder. Thanks!

We must help this poor little man with his ultimate quest of being the master engineer of Nostalrius... slight RP

You need to go to the normal Engineering trainer for that (Hes in Gadgetzan right outside the entrance to the inn, its the same guy you learned 225+ from). The Gnomish/Goblin Engineering trainers only teaches you Gnomish/Goblin recipes.