Someone on the replicator google group mentioned they wanted more cooling for their MB. I think it might be overkill but here it is.
I just added an stl version of the fan mount so you don't need a laser cutter to make that part. You can use a hand saw of jigsaw if you want to cut the holes for the main cover.
This is designed to force air in from the front & back left side of the replicator and exhaust it in the center towards the right side.
I Added an additional 40mm fan mount on the cable pass thru support. I also make the cable pass thru considerably smaller to restrict airflow yet still allow cables to pass thru.
I made 2 intake ports on the front and back to bring in cool air.
I soften up the corner where the extruder assembly exits to make it easier to take on and off the cover.
I simplified the finger hole and added a second to also make it easier to remove.
I also corrected the nut retainer on the cable pass since it was off in the orginal design from the bolt hole position on the shipping model.