Case for Temperature/Humidity/Dew Point sensor

UPDATE 20170618 case2 is more stable; cavities for screws/nuts enlarged a little too.

This is a case for Sensirion SHT31 Smart Gadget: https://www.sensirion.com/products/humidity-sensors/development-kit/
It is a not so expensive and quite precise temperature, humidity an dew point sensor that can be also read via bluethoot from a smartphone, using a free available app.
The case is simple to print and just needs four M2x10 screws/nuts. Cavities for screws and nuts are intentionally "tighten" as I prefer to insert those part heating them a little.
The button is needed to switch between Temp./Humid. or Temp./Dew Point data display and to switch on/off bluetooth connection.