Waterproof housing schematics: The Safe Drone
The above image shows the minimum clearance for the following parts:
Top Layer: GPS, Generic Flight Control(HobbySiglo), BoardFutaba 3008SB Receiver (from L to R)
Middle Layer: Power Distribution Board (Soldered to Dean connectors and ESCs)
Bottom Layer: 2 x 3200mAh LiPo Batteries