Here is my take of the Naze32 case. I try to make it as light weight as possible.

Print instructions

Print a copy of Case_Lower.stl
If your 6x3 way and 3x2 way pins are horizonal (ie. 90 degree pins) , print Case_Upper_H_Pins.stl
If your 6x3 way and 3x2 way pins are vertical (ie. straight pins) , print Case_Upper_V_Pins.stl
If your 6x3 way pins are vertial and 3x2 way pin are horizonal then print Case_Upper_H1_V2_Pins.stl

Shape the screw holes of the upper case with a 3mm drill bit
Shape the screw hole of the lower case with a 2.5mm drill bit then tape the holes with a M3x0.5 Tap.
Put your naze32 flight controller inside and screw them together with nylon M3 x 12 countersunk machined screws. Of course you can use metal screws if you don't have nylon ones.