Paul, since you have already done us service by dismantling these and if you haven't tossed them already, I wonder if you could check one other thing for me?

I have drilled a hole through the end of a Spark-lite before to put on a key chain but I don't know how long the solid portion of the Spark-lite "handle" is. Can you check for me?
I'm looking for the dimension from where the spring butts up against solid plastic to the end.

Thanks much

jenks