To get the feel of how the slider should roll off of your index finger, use this grip and practice at half speed and roughly half the distance to the mound.
I published, privately, a collection of my serious poetry I had written over the years. I only published 50 copies, which I gave to friends, in a special deluxe edition. It was ridiculously expensive but I'm glad that I did it.
Let us always meet each other with smile, for the smile is the beginning of love.