I backed both books, and both times there were some production issues—this time around, with two _switches_ instead of two buttons (so four possible states, mor

I backed both books, and both times there were some production issues—this time around, with two _switches_ instead of two buttons (so four possible states, more complex hardware, etc.), the production timeline has extended a few extra times. It's all much harder once you target child-proof design, especially since things like page lamination get tricky! It's been fun to watch and learn from (though I'm certain less fun on the production side) as someone who tracks a lot of hardware projects.