Raspberry Pi 4b CryptoMining Rig

Remix of nirmaljangid's design.
Just made a small change by increasing the spire height to allow for a standard 4010 fan to cool the pi.

Edit 8/24/2021 - Added a new frame that holds the Cooling Tower in place. See new photos of white rack with purple frames. You only need a couple per rack to hold securely

Edit: 11/18/2020 - Added a fan mount for the Fram_40 stack. Keeps the fan off of the micro SD card.

Added two images showing both versions in full build mode.

Edit: 11/17/2020-Added a flat top part, simply for aesthetics

Edit: 11/16/2020- Added a Cooling tower for the original short spire design. One fan to cool all four Pi's in the stack. Uses a standard 4010 5v fan (I use this one: https://www.amazon.com/gp/product/B0836QHNTN/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 )
The tower sits behind the rack, I have it attached with double sided foam tape just to secure it.
My testing:
Ambient Room Temp 80F (26c)

Using the redesigned Holder with tall