I agree there's not enough information to determine how much he is contributing. I see some wood and a soldering iron, but I don't see evidence he is populating the boards himself, or his jig for making the finger joints. He might be but he doesn't show a set up sufficient to determine. I'm also skeptical of the claims that there are trade secrets involved in assembling known designs and boards made by others and putting together a rectangular case. The Bob Moog factory in Asheville has glass windows around their factory floor and customers are invited to watch their entire assembly process. Does Moog have more protection worthy trade secrets in their assembly methods than these designs? Probably.

If he is putting fully assembled boards into a premade box, is it hand made? In his post it sounds like he is saying he designs the front panel layout and has it cut and stenciled at a facility somewhere, and no doubt he screws in the potentiometers, attaches the knobs, and solders the leads. He says the boards come from China and are designed by someone else. He doesn't say if he populates the boards or if they come finished, ready for lead attachment. If lead attachment and the panel layout this is the extent of his work, perhaps etsy might not consider that truly handmade. Or perhaps they want more disclosure about how much is done. Maybe some consider that handmade, others not. It's kind of hard to say. Let's say I am a customer and someone is selling original "handmade" instrument designs in a wooden case. I very well may assume from this claim that it was their own design and they made the box. I probably would not be shocked if the board etching was done elsewhere. But then what if I find out that all the electronics were designed by another person and the boards are not just etched but populated in a large Chinese factory and arrive at the seller's house assembled. Was I ripped off by the claim it was handmade? Maybe.