This is a small Remix of Malolo's great Case design:
Added a hole for a 30x30x7mm Fan in "Raspberry Pi 4 30mm Fan Case TOP.stl" since the raspberry 4B 4GB is heating up to ~62°C in idle without a housing.
By adding a 30mm 5V Fan i was able to reduce its idle Temp. to ~42°C without using additional heatsink.
To read CPU temperature execute the following command within a terminal window:
I fixed the Fan with 4x M3x12 screws and 4x M3 nuts.
Connect the Fan as shown on one of the pictures (Pin#02 = 5V & Pin#06 = GND)
Silk Copper, Silk Gold