Squinny is the closest thing I've heard to "grinny", which made it into a "Pittsburghese" book I got when I moved here. Even the book didn't know where that one came from though. I like it a lot, because they make me grin.
So you know any history on the word squinny?
I liked your article - I am in the camp with "if you don't mind where it is, let it grow".
They leave pits from my black cherry tree here and there, too.