Thanks. That’s the kind of advice I need. Some type of mechanical joinery would be better instead of simple finger joints. I can’t imagine that this would work out from the start, especially in the fact that the tabs are sized for 6mm material. I put some Celtic knotwork on it it. It’s all paths to be able to select fill and stroke color and width. Not sure what actually works. I can send the *.svg if you want to have a go at it. Also the idea of how to position. In the cut file, does one try to save materials and space by having common lines for the parts?
Thanks @dan for pointing to the plugins for turning faces to *.svg in Sketchup. That saved lots of time.