I found the technique at a
facebook NAFEX site. The guy does a hole that is normal to the surface for the trunk and also for the top dressing. No angles so there is more contact area on the side graft and about the same as top grafting.
He claims high success rate but has only tried it on chestnuts and persimmons. He mentions it
should work on Pears and Apples also.
Worth an experiment since this would make a much stronger graft.
"Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning." —Albert Einstein