I can't imagine playing with the inside edges of fingernails.
One thing I do do (that voodoo that you do so well)
is something I copped from my mentor Red Mitchell. When I want a different color during a solo I will use the back (or, the surface) of my index finger nail to get a more intense kind of ""zing" on a particular note for color. That attack makes a note stick out real nice now and then.