As we didn’t find any shelf of our liking we tried to create it ourself. It worked out better than expected, however it obviously isn’t perfect. But as completely laymans we are happy nonetheless.
One cool feature is that through all pieces goes one straight hole, this allows putting lamps on the shelf without seeing any cables.
Very good. I was worried that you had made a rookie mistake and was going to have a shelf run a rummage sale on your floor one day. The plywood may not be enough if it is like a veneer, so check on it a few times a year. Worst case, you get to learn how to do a bowtie in a few years.