@mamuang that link is working for me in the old post
The joey red flesh are growing like a weed using harrow delight as an interstem on callery. Two reasons i grafted to harrow delight #1 harrow delight produces quickly which should make joeys red flesh produce quickly #2 harrow delight grafts easier or as easy as ohxf rootstock because it was crossed with rootstock in the first place ( (old home x early sweet) x bartlett) Harrow Delight Pear