Congratulations John, that is a very heathy avocado tree!
Meanwhile, my doublerootstocking avo single experiment failed, the small sprouts
that broke the tape didn't continue pushing and the scion eventually dried up, even though
both rootstocks are still alive. (I may try again later).
Last week, I started an approach graft -also my first- of a Fuerte seedling to a young Sir Prize,
I have doubt if this will succeed since the thickness of the Fuerte seedling is much skinnier compared to the Sir Prize tree, so I'll wait and see...