/waste c on SMP4, go east and down stairs & ladder. thx 2 sloan 4 helping test the grinder. he found some bugs so i could fix them right away ^.^ shell & me found spawner in waste: and b/c i helped shell build grinder on smp2 i wanted one on smp4 this is service area where u can access spawner: u need 2 go down the ladder 2 get to grinder: just wait b4 cobble fence & zombies will drop down. very nice 2 get xp & rotten flesh ^.^ thx 2 sloan 4 testing (he came up with idea 2 use carpet on top of hoppers) & shell 4 helping me build ^.^
Special thanks also go out to TomvanWijnen btw for his extensive tips on working out a grinder. Because we weren't so close to spawn I could put those to good use (the grinder area was my doing) and it fully worked. Including the on/off switch using redstone lamps