Oh my... Just remember the FORD/FIRESTONE fiasco a couple decades ago. Ford contracted Firestone to design/build a tire for their explorer. Firestone did and supplied Ford the tires. Ford and Firestone used to be corporate friends/bedmates, until ford got complaints about their top heavy explorer and decided to implement a reduction in tire pressures to lower the CG of that explorer (supposidly to reduce rollover potential). The rest is history with Firestone eventually winning on appeal and recovering all lost revenue (but never recovering their reputaton 100%). That was quite a fight that Ford lost, eventually. Shame they didn't 'step-up-to-the-plate' from the beginning, the Ford/Firestone relationship was many decades old until Ford tried to avoid blame on that rollover issue.

Bottom line I am trying to say, doorjamb is a good start, but the daily application/conditions must be evaluated in each use. Mine are at 35F/36R (I mostly ride spirited up to 80, rarely higher). Very interesting reading, this post is!