After installing the si-97a heatsink on the dfi nf2 ultra b mobo and then put in its new home (lian li v1000 plus) I came across a problem. The heatsink fits in there really snug but theres an even bigger problem, I had to take the 120mm fan out of the back so now there is no airflow on the back end, is there a replacement 120mm slim fan (not sure what its called) that I can put in place of the normal size 120mm fan? If so can someone recommend one. Thanks!