I just posted in the hybrid thread about using alcohol to remove the astringency in Gora Goverla and Nikitas Gift. A ripe but still firm Hachiya would be non-astringent in 3 days, but it took 5 days to get the hybrids to be fully non-astringent. I would imagine that the higher the percentage of American persimmon in the parentage the longer it might take to get them non astringent and possibly some hybrids won’t work. I expected it to work with Gora Goverla, since I had heard of others doing it, but I was please to see it work with Nikitas Gift as well.
Here is the picture of the persimmons in the bag 5 days ago with the little dish of gin.