Raspberry Pi 4 RAM Upgrade - Tutorial?

If you need a repair or upgrade of a device, please follow this link: https://rb.gy/v6izn

Here is the link to my Patreon if you want to support what I am doing:
https://www.patreon.com/MadEDoctor

There is a link to the Raspberry Pi forum topic where different memory is listed and discussed.
https://forums.raspberrypi.com/viewtopic.php?t=277251

Below are the chip codes and links for each one where they can be purchased.
Micron D9WHZ | MT53D512M32D2DS-053 WT:D – 2GB Chip : https://rb.gy/1akj
Micron D9WHV | MT53D1024M32D4DT-053 WT:D – 4GB Chip : https://rb.gy/1q6d
Micron D9ZCL | MT53E2G32D4NQ-046 WT:A – 8GB Chip : https://rb.gy/agrf

These are the tools I am using:
Microscope - Amscope SM-4NTP with x0.5 Barlow lens
Amscope: https://amscope.com/products/c-sm-4nt...
Amazon: https://www.shorturl.at/fgy56

SM05 - 0.5x Barlow lens:
Amscope: https://amscope.com/products/sm05
Amazon: https://www.shorturl.at/lvCGZ

Soldering station - JCID AIXUN T3B with T210 Handle:
Aliexpress: https://rb.gy/hwql

Hot air station - ATTEN ST-862D:
Aliexpress: https://rb.gy/sz2z | Amazon: https://www.shorturl.at/IOTV1

Tweezers:
Aliexpress: https://rb.gy/ycgl
Aliexpress: https://rb.gy/3gwd

Rosin atomizer:
Aliexpress: https://rb.gy/ce4x

Board holder - T26:
Aliexpress: https://rb.gy/k2pv

Fume extractor - Aliexpress: https://rb.gy/83sl

Flux - Aliexpress: https://rb.gy/dicav

Solder wick - Aliexpress: https://rb.gy/ykt8y

Different stencils I use:
Aliexpress: https://rb.gy/mqewwu
Aliexpress: https://rb.gy/nvzfvs
Aliexpress: https://rb.gy/axg9ut
Aliexpress: https://rb.gy/dyhkj2

Email for contacts: [email protected]