WorkSafe NZ has contacted The Shed and advised us of two recent deaths of New Zealanders using a Lichtenberg wood burner. They have advised us that these electrical devices are not safe to use and are dangerous.
Do not build or use one of these machines under any circumstances as they are unsafe and can cause fatal injuries.
See this information on the Worksafe website https://www.worksafe.govt.nz/about-us/news-and-media/fractal-burning/

Man who gives a toss
The incentive for the project came from Dave’s sons, Josh and Andrew. The boys were jumping their bikes and Josh (13) came up with the ultimate idea—throwing their bikes with a trebuchet which they had seen in action on computer games. The boys started with a small trebuchet using stones but it didn’t throw them far so dad got into the act. Dave checked out machines on the internet that were even throwing cars. The world record is a 630-metre throw. He was impressed and thought he would give it a go. He had some Lawsoniana trees he intended to drop so thought now was the time. He finds the Lawson trees were straight and the wood is very flexible.