🛠️ Laptop Upgrade Workshop: UPGRADE Checklist, Speed Gauge, SSD, DDR5, Fan Cleaning and Thermal Lab

Open a laptop on a sunny desk, ground yourself, unscrew the base with the right bit, swap the SSD, add DDR5 RAM and clean clogged fans, then watch the second laptop's UPGRADE checklist tick off and its speed gauge swing, backed by a thermal-throttling model, PCIe/DDR bandwidth maths, screw preload limits and an ESD model.