Here's my update. I ended up taking out the Oro Negro tree. It never grew very well for me, and also the fruit had serious ripening issues. I don't believe I'd ever plant Oro Negro again.
This shows you how "terroir" and location, climes can differ, also methods of planting. My Oro Negro was/is very vigorous producing a huge amount of fruit not ready until the following year around Feb. and March. It now hosts Jan Boyce, Lamb Hass and a huge amount of Sharwil. I'm sure after the freeze there's a branch in there of ON left. Flavor was not bad.
Lamb grafts producing this June:
