I have some Persimmon, that is in the drying rack. The bark looked like that, and pipe straight. When it was de-barked the odor reminded me of carving pumpkins. On one of the staves, reduced to near bow dimensions right off of the stump, checked so badly that light could be seen through the checks. That happened despite a shellac coating. The rest, left in quarters have stabilized to ambient moisture, without any further checking. I suggest restraining them on a timber or joist, it will help keep them from twisting, and you can put some reflex into them at the same time.