This is a case for the Raspberry Pi 3B that have a good protection.
Your can customize your own case by choosing the differents Top parts and Bottom parts!
This is a really well done design by a friend of my and ask it to upload.
NOTE 1: Only the top parts need supports!
NOTE 2: For the fan top parts notice that the fan is a 30mm fan mounting point!
NOTE 3: You will need to assable this case 4x M3 18mm screws and 4x M3 Nuts!
NOTE 4: Have fun with it :D
A friend of my measured first all the dimensions en then taked it to Solidworks to make the model.