I updated the post "More chronology attempts" below.

I originally mistakenly reckoned the Yehudah/Er/Onan/Peretz chronology assuming 39 years since Yosef was sold, noting that it cut really close. 39 years would really be from the time Yosef was born, and even there it was cutting it close. It becomes even harder to imagine if we say it all happened in 22 years. And see my suggestions below in that post, which I will hopefully get to fleshing out soon.