Diana, I don't do much fertilzier on my fruit trees, I should probably give it some this year. They are lucky if I water them a few times a week. Yes, I do notice the Sakip is a vigorous grower and it does have a lot more flowers than the Kohala. Last year was the first year it fruited and it had a large cluster of fruits. I hope this year the fruits get larger than the Kohala. I did get some of those bigger longan fruit scionwood but my grafts died so I will need to try again.
Kaz it seems every fruit trees' photos you post all yield hefty fruits, very healthy and probably delicious. So what amendments you added to the soil yearly beside only "lightly" fertilizer use.
I talk to my trees all of the days that I am not working, water a lot and add all kind of fertilizers, including all amendments and they hardly produce the fruits. Plus the fruits taste not that great either.