I still prefer my main RPi 3B+ setting over that earlier cheap passive aluminum case:
Akasa aluminum case, during installation of large sticky thermal pad to bottom, I included 0.3mm thick copper shim (bought x5 set from banggood) with it, even without copper shim it hit to bottom plate, so now there is little more pressure added with copper cooling effect.
And instead of using blocks of aluminum thermal modules for CPU and USB, used these (along with akasa provided sticky thermal pads)
https://www.alphacool.com/shop/grafikka ... ack-10-stk
They hit to top lid, but still was easy to finish build.
Akasa case build (Alphacool GPU heatsinks used instead of block aluminum pieces, copper shim added to bottom along with Akasa thermal pad):
around 60-61 celcius on stress, better WiFi reception, LED lights seen!, looks better, more small "ventilation" holes, around 3 times more expensive, MicroSD card impossible to take off without tools.
Cheap aluminum case build (Akasa thermal tape used with case passive cooling):
around 65 celcius on stress, way much worse WiFi reception, LEDs not seen, simple look, cheaper, MicroSD card easy to take off.