Raspberry Pi 4 Case with Fan (extended heat sink remix)

Remix of original https://www.thingiverse.com/thing:3901271

Changes:

• extended inner space for bigger heat sink. (My heat sink is 20x20x14mm)
• M3x35 screws to mount it together (you need to drill pRi mount holes by 3mm drill bit)
• better access to SD card