I tried this:John Deere 500c backhoe sharpend a frost breaking tooth set up the 16" Americam rock elm Raised the boom up 12' and let her rip. Nada, nothing, it did not split. At that point I applied full hydralics and all the downward pressure the only thing that happened is I lifted the entire 10 tons of machinery off the ground but no split. Thats a lot weight and down force and nothing happened. I can rip the tree out of the ground but it could not split it?