Homemade Cherry Pie Filling and Pie

My new landlord has two cherry trees in his backyard. I happened to move in right as they were ripening up. With all these cherries, it made sense to start processing them in a smart way. Pie was an obvious choice.

The cherry trees bear Rainier Cherries. I'm told these are best suited for snacking on as they are a premier cherry. But after making homemade cherry pie filling with these, I beg to differ. Let me go over the recipes I used to make this pie.