This is a model for a front dust filter for the Cooler Master MasterBox NR600 case to catch finer dust better than the front mesh.  It covers all three of the front fans and attaches directly in front of the fans using magnets.  The cross-supports line up between the 120mm fans so that the filter is not visible once the front cover is reinstalled even when using RGB fans.

Additional Parts Needed

• 6 8x3 mm round magnets
• black pantyhose

Assembly

• Print two copies of each part
• Take the two copies of Part A, rotate one of them 180 degrees and press them together at the dovetail joints
• Take the two copies of Part B, rotate one of them 180 degrees and press them together at the dovetail joints
• Press 4 to 6 round 8x3 mm magnets into the holes in Part A.  The magnetic direction won't matter.
• Cut off the foot of some black pantyhose, about a foot up
• Stretch the pantyhose around the frame made by the Part B's
• Press the Part B frame onto the nubs of the Part A frame