Reducing pretravel on a Glock pistol

*EDUCATIONAL PURPOSES ONLY* Read description below for more important information

Watch Johnny Glocks video for the trigger safety tab modification (6:30-11:30). He explains it well and there's no need for me to reinvent the wheel here.
https://rumble.com/v1hz8gz-glock-pre-travel-reduction-pt1-educational-only.html
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Links to items needed (I get nothing from these links)

4-40x3/16" set screws and wrench
https://tinyurl.com/5b7cphxm

pin vise
https://tinyurl.com/f32kn6jv

4-40NC tap and #43 drill bit
https://tinyurl.com/2t3bcvaa