Here's part of the old post last year:
I have added about 18 new persimmon cultivars to one tree, all of them bark grafted using this method. I also added a combo T-bud below some of my bark grafts, for those cultivars that reliable friends have told me of their really low success rates with them. By using both methods, bark and T-bud combo, it increases my chances of successfully adding even the difficult cultivars.
Notice very clearly that the leaves are breaking out when I bark-grafted. This is to insure proper bark slipping, easy operation and quick graft healing.
And here's the grafts sometime later, 18 kinds added to this tree, 2006. 100% take and all growing strong.
Note that some have fruitlets already. I got really nice big quality fruits from these new grafts sometime in September. Although the stock have harvestable fruits since mid August, the total harvest of all cultivars lasted until December.
And here's the link to the tutorial.
link
If there's something unclear about the recommended method, I'd gladly explain. This has really worked the best for persimmons, and the evidence is right before your eyes, no camera tricks or graphics manipulation.
Of course we can always experiment with other types of grafting and share the results. But if the scionwood is not common or hard to obtain, I would shoot for the methodology that would work best for the specific cultivar type.
Once you got it to take and vigorously growing, then you can try other grafts and see what happens.