How to Use Pin Squats to Fix Squat Sticking Points

I have a major sticking point in my squat just above parallel. I can get out of the hole fine but then I hit a wall and my hips start to shoot back. I have heard that pin squats are an excellent way to target this specific area.

How do you usually set up your pin squats? Do you set the pins exactly at your sticking point or slightly below it? I am also wondering how much weight I should be using compared to my regular squat. It seems like it would be much harder since you are starting from a dead stop without any stretch reflex.

Have pin squats helped any of you overcome a persistent sticking point? I am looking for ways to spice up my training and address my weaknesses more directly. I would love to hear any tips on how to perform them safely without damaging my barbell.