Pruning/grafting question number 2

sandbur

5 year old buck +
What should I do about this split being open?

Keep it full of wax? ( I know that I need to remove one of the grafts.)

IMG_8431 2.jpg
 
I have left splits on my grafts like that to heal on their own. Not sure if the wax would do more good or bad.
 
I have kept Treekote on mine.
 
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