Koach a Z is definitely a fun car .... The three-wheeler was built by a Danish man in Lae, Papua New Guinea he had it almost finished and was transferred by his company and left the country. We bought it and MrNan completed the work on it and got it up and running. We had a lot of fun with it, and yes it was very fast and could be a bit dangerous if you didn't know what you were doing.
In Lae which is on the north coast of New Guinea, there are several old disused wartime airstrips and we often took it to one near where we lived and had some fun. One of my daughter's school friends came out to our house when we were driving it and after he saw me driving it he declared that "MrsNan is definitely Wonder Woman, no normal mum could drive that thing!"