I don't know about "regularly" when they're citing one person who did most of these retrofits - that sounds like it's not happening very often at all, my uncle

I don't know about "regularly" when they're citing one person who did most of these retrofits - that sounds like it's not happening very often at all, my uncle used to do GA maintenance in (the state of) Georgia, and never saw this as a Cessna mod. But I'll concede that article makes it clear this is a real thing non-crazy people do which I was not aware of.