I grafted Sestronka to a very small rootstock, and it had one fruit 2.5 years later: Persimmons 2022 - #101 by ncdabbler
Since then it has had larger crops each year and has been a vigorous grower. I top-worked two kaki trees to Sestronka this year because I like it so well. I haven’t been counting the harvest, but I probably had about 100 fruit from my tree last year in spite of significant pruning to maintain the structure I wanted. It has at least that many fruit again this year.