I'm new to 3D, this case is my first design. The 12V 40mm fan will help the IC to stay cooler. The two tab for the screws are glue after, so no need to add support for the printing and you can locate them where you want. It have already a hole unused on the side, you just need to make one hole on top for the second screw. You can install the fan directly on the case without the second part with the Anet A8 name. The Anet A8 letters have 1 mm height and are paintbrush with acrylic paint.Tell me your comments.
12V fan 40mm computer fan from Ebay: http://www.cafr.ebay.ca/itm/Mini-Premium-DC-12V-2-Pin-40mm-Computer-Chassis-Cooler-Cooling-Fan-PC-Black-/271832292851?hash=item3f4a779df3:g:ECcAAOSwv0tVJNVy
40mm fan guard: http://www.cafr.ebay.ca/itm/4cm-PC-Silvery-Metal-Wire-Finger-Guard-40mm-CPU-Fan-DC-Fan-Grill-Guard-Protector-/222309461946?hash=item33c2ad2fba:g:FKoAAOSwB09YIt9C