Thanks.
Quote from Poopinhammer
as opposed to making a metric ton of hoppers, why don't you flush all the mobs to a single spot, THEN drop them to their death?, only 1-4 hoppers needed then.
It had crossed my mind, but the space between the top of my base and the bottom of the spawner is thirty one blocks. 30 for falling. 1 for hoppers. Although after typing that I am still dreading using upwards of 5 stacks of iron. It's not too late to rework the base, and I may.
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