Created this with top and bottom mounted 120mm+ fans.  I use 120mm fans with 230cfm and added heatsinks with arctic mx-7 thermal paste and upgraded 120mm fan on front of miner to heavily overclock.  One version has ports at top or bottom to feed the power cable in.  I use it on bottom for cleaner look to me.  The other version you could drill 4 14.5mm holes in the 120mmm fan spacer on top or bottom to feed the power cables through as well.  I AM NEW TO CREATING so please be nice about is very basic design.  I will create more fancy designs as I get better and gain experience with creating.