My first thought is that this should absolutely be sold along with every pullup bar. I wonder if the author has tried to contact them. To take this to the next

My first thought is that this should absolutely be sold along with every pullup bar. I wonder if the author has tried to contact them. To take this to the next level I would want geofenced app integration so that if I started to slack off, and I was home, I would get a reminder to go do some pullups.