Video: How to Re-install the Thumb Screw and Spring for Vista Laser Module?
Video link: https://drive.google.com/file/d/1LFRaWiIPXuloWNB5tnqe7K5wLMrRBOBz/view?usp=drive_link
Note: the screwdriver needed: M1.5.
FAQ:
I don’t have spring any more.
Contact support for the spring specification.