Yea, Don, I have on handle that opened up like that too. I don't have plans for it--I'll probably fill with homemade resin or wood inlay up through the fade.
A week or so ago I took my pile of OS outside in the heat and watched it over time. Some of the larger pieces began to check so I CA'd the cracks and took them inside. No further checking to this day. The heat was just too much to soon for the bulky sections. Lesson learned.