Some scientific methods are quite simple like that! Doesn’t have to be complex to be effective
From memory it’s 41psi all round for half load and being as nobody likes me I’m normally driving solo so don’t need anything higher than that.
I do run around 38psi front and vary the back a bit depending on if I’m carrying crap around with me or not. I can’t remember what full load pressure at the rear is but it’s bloody high!
The sticker pressures on mine reflect that the car came on 18’s too, 19’s might be even higher PSI recommendations.