Kiwi, that's pretty cool , zapping the slabs like that. I checked out the link. One thing they say that I don't follow is, the wood won't combust after zapping. I was 4th generation in my family doing residential tree removal. Have taken down many lightning struck White Oaks and Tulip Poplars and they burn just fine. Some people say lightning struck trees pop and spit when burning, but I have never seen that either. A couple years ago I took down a large White pine that got struck. It blew a channel out of the bark from the point of impact to the ground, then blew a furrow in the ground, following a big root 20 feet from the tree. I gave all of that wood to one of our Boy Scout leaders to burn in their camp fire, it burned fine, no flame resistance at all, Joe.
