Thanks, the Janko layout was another one I was trying to remember; I was thrown because the images on the Janko wikipedia page are of the original Janko, and I

Thanks, the Janko layout was another one I was trying to remember; I was thrown because the images on the Janko wikipedia page are of the original Janko, and I had seen the Janko layout on the Japanese keyboards (e.g. the Chromatone and the Wholetone) which use hexagonal keys so look quite different.