My neighbor's apple tree suffered for the last 30 years and then punched out a monstrous root sucker over the last few years, dwarfing the original grafted tree. I made this video of me grafting this apple tree with some details about how I go about it.
https://youtu.be/yERWjyxQvtsCan't wait to try this bad-boy out in the future with the 6 new types on it. Akero, Regent, Bill's Red Flesh, Cinnamon Spice, Irish Peach, Goodland and a fresh graft from the old graft.