Twang
I also got the light for it and have swapped the red pin for the green one
What a difference turn that light on and the green pin just shines nice and bright I used it on Weds nite indoor.
But what I did do when I replaced the fibre optic was just put it in as it came I did not melt it like they said to do now the pin size is about .019 really good for dropping it on the center of the x