Gary blowed up the other zombie spawner near Spawn. Greenie was nice enough to give me a location of another sorta-nearby zombie spawner.
Therefore, there’s a NEW slightly-improved XP Grinder at coords:
-419, 30, 703
I built a house at sea-level with a drop-in to make it easier to find.
Zombie XP Grinder on Temporkalypse v1.9pre4
Head out the WEST door in the community hut. Follow the signs.
Ladder from Surface located at x,y,z = -194, 64, 233
(Also accessible from Branch Mine)