We have been hearing complaints about KMC's visor being unfastened. There is an easy solution here, crediting to a real friend of ours.
Tool needed: an awl
Skill level required: zero
Drill a slight dent at each side of KMC's head where holds the visor, the dent doesn't have to be deep, just use your awl to make a gentle touch. The outcome will be unbelievably amazing.