Printed with Atomic PLA on a sE1X, for a sE1X. :) Print took a few hours but I love having the airflow on the steppers. One thing I did diff. was have one fan sucking air out while another is blowing air in..3 seemed a bit overkill for me.
You will need some M3-16's(4) and M3 nuts(3 to each M3-16). 1 M3 nut to hold the bolt in place, 2 others to clamp to the smoothieboard in the air. The holes on the sides of the case are raised enough that you can't just set the smoothieboard in it without any support..this is just how I did it though.