I just ate two nubbin Lemon Zest from my tree on Florida rootstock and it was soooo sweet I decided to bust out my refractometer. It was shockingly sweet, even sweeter than the Gary Mango we had at the Mango tasting at Peters Orchard. These LZ I just ate are the same ones that are round and have noticeable lenticils.
The longer fruit had less acidity, the rounder fruit had an orange zest flavor. Anyways, my refractometer only goes to 32% Brix so the Brix of these LZ exceeded the limitations of my refractometer. I still have one or two hanging on my tree. If anyone doesn't believe this report, I would gladly share a bite of the last fruit which should ripen very soon.
I will purchase a new refractometer with a higher limit. Honestly, I feel the mango was just too sweet.
Simon