When we first chose the cave to put our world map, we didn’t realize it was a slime chunk but figured that out at some point and started borrowing out some floors below the map room to allow slimes to spawn. On the top level, we had a kill zone made up of an Iron Golem to attract the slimes and some cacti to kill them. I updated the setup by burrowing out a kill zone that spans one side of all the floors from top to bottom, with iron golems at each floor to attract the slimes, and a brimstone floor at the bottom of the pit to kill them. Under the brimstone, I have a hopper cart picking up any slime balls and dropping them in a new loader which I’ve added to our service line. Here are some pictures.