When used on an Open Media Vault Pi 4 home media server that is mostly idle, I only have a 10 degree C temperature drop compared to a simple 3/4 " x found 3/4 " heatsink that was on top of the processor. It operates at around 52-54°C (125-130°F). The jig benefits from better machining as bars that fall onto components are not milled flat and the coating/paint applied to the jig also reduces thermal conductivity. Clear traces of processing can be seen on the underside. If the manufacturer reads this: Discard the paint/coating as this will only reduce the efficiency of the cooling performance and reduce the contact distance to the components. Then you have a winner for a passively cooled case.
Vilros Raspberry Pi 4 4GB Complete Starter Kit - Black Fan-Cooled Aluminum Case for Heavy-Duty Performance
12 Review
🌐 MCIGICM 2 Channel DC 5V Relay Module: Optocoupler Low Level Trigger Expansion Board for Arduino UNO R3, DSP, ARM, PIC, AVR, STM32, Raspberry Pi
11 Review
REXQualis Comprehensive Starter Kit with Arduino MEGA 2560 & Detailed Tutorial for Arduino IDE Compatibility
11 Review
GeeekPi Raspberry Pi Cluster Case with Cooling Fan and Heatsink for Pi 4 Model B, 3 Model B+ & 3/2 Model B
11 Review
MacBook Retina 13-inch (A1425, A1502) and 🔩 15-inch (A1398) Bottom Case Screw Set with Pentalobe Screwdriver
11 Review
🖥️ Helifouner 450-Piece Computer Standoffs Spacer Screws Kit: Ideal for Hard Drive, Motherboard, Fan, Power Graphics & Computer Cases
10 Review
36-Pack Black Rubber PC CPU/Case Fan Screws/Rivets Set for Computer
11 Review
uxcell 3.5" HDD Screw Black 200pcs for Computer PC Case - Flat Phillips Head - 6#-32 - Hard Drive Fasteners
10 Review