I have made a ethoslab dark room grinder but the results are not very good. it's like the spawn rate is in the tutorial but it's low. and all the caves are lit up. I can't extend the grinder in front or back. because in front I have have a skeleton spawner trap. and in the back I can't move the mobavator. so I can only extend from the sides. how many pads I should make to get high spawn rate??? note: the pads in the grinder is 14 by 14. and my second problem is the ender mans keep taking the blocks from the spawning pads (I am using grass) if I changed the block type is it will effect on the spawn rate???