Again - like I said, I don't think that's a likely scenario at all. I think this guy did his stuff right and so on.

But there's all kinds of unanticipated failure modes when someone without actual knowledge of a device generates a data structure that mostly kinda sorta works, and the FAA does not do anything halfway. The people who designed it okay it, or you get it re-certified, or else it's not approved (except experimental certification, based on what people are saying).