Yes. As VB mentioned earlier, it is possible/likely that the analysis and engineering going on is more extensive than Peter shows. This analysis could be Peter's or his associates'/friends'. It would be interesting if, before the build video, we could see any work or even TLAR that went into figuring the foam webs in the wings.Keep in mind that Peter is not designing an HBA to be useful or even replicated. He is providing entertainment on YT as a business venture. He is very good at that.
Some folks find it more fun/inspiring to believe Peter is sketching things out on a napkin and just going for it. I'd find it more entertaining to see a 5 minute explanation on the white board, including any TLAR bits or "build and test" portions ("iterative engineering").