Restoring the original Dual Shock for my restored Play Station 1 Retro Console Restoration Repair

I needed a DualShock controller for my restored PlayStation 1 so I wanted to do a restoration and repair for one. I got my hands on this abandoned DualShock controller for the PS1. It was sold to me as working but, as usual it was broken The shell is also quite badly yellowed and dirty. Couple of the screws on it were rusted. I tested the controller and with the help of another Controller I was able to get to the options and found out that the X button is pressed down all the time. I was able to test most