Wow, thanks so much for this info.
I have an Alano and a Hasya, both at least 5 years old , and are grafted.
Alano has always been in ground, never bloomed.
Hasya was in a pot for 3 years, bloomed profusely, not a single fruit. I then put it in ground 2 years ago, got a few flowers, zero fruits.
I'm gonna bark invert both of them. Crossing my fingers!