Rosseyanka Persimmons--How hardy really?

At first, I was hoping that I could plant a Nikita's Gift persimmon, but most sites have its lowest zone as 6.  Upon doing more reading, I came across the Rosseyanka which is supposedly hardy down to zone 5.  I live in Vermont, in the Champlain Valley near Middlebury, more specifically, and although I have some straight American varieties planted, I would really love to have a cross.  I was wondering if anyone has tried to grow a Rosseyanka in zone 5 and whether you baby it at all with wrapping/insulating in the winter or if you can just let it be.  

This winter (so far) has been very mild.  The weatherman said it hadn't gone below zero yet this year, although I thought I remembered a few nights where it had.  I don't know it this is a fluke or if this will be the new normal, but either way, we are a true zone 5, and I wouldn't want to invest the time and money and have the tree die from cold.  I would appreciate it if anyone who actually has or has had a Rosseyanka in a zone 5 climate (preferably in the northeast) would chime in.  Thanks, in advance!

Here is some information that might be helpful to you or others:

Richard said,
I have two cultivated persimmon varieties that have been fruiting heavily for a few years, Juhl and Rosseyanka, plus other varieties that are smaller. The persimmons have proven to be resilient and have few of the pest, disease and rot issues that make many common fruits difficult to grow here in southern Missouri.

https://permies.com/t/129279/Harvest-Pruning-Cultivated-Persimmon-Varieties#1014728

I hope by bumping your topic others will chime in.

I checked on Missouri's zones, and it appears to be mainly zone 6.  When I went back and read Richard's post, it reminded me that the Asian varieties need to be individually clipped.  That got me over my desire for a Rosseyanka pretty fast!  Most have made the comment that they like the flavor of American persimmons better anyway.  They are considerably smaller, but that's an easy fix; just eat two or three vs. one!  I'm just hoping that this is the year that some of mine fruit.