Yes, i spawned in the middle of gods knows where in the end and flew towards the 0, 0. I noticed oil wells along the way as well as a few dragons, killed 2 and went back to the overworld with my nice new experience and enchanted stuff all good right. Went back for a second trip, 9 more ender dragons, not sure whats going on but I've got all my stuff enchanted and still 292 levels remaining.