When I fitted my Pajero with 33 inch BFG MT on 15 inch rims I was outside of the makers tyre pressure recommendations. So searching around and talking to off roaders in LROC in UK and Oz a rule of thumb was to inflate to wha you think should be okay based on tyre type and vehicle weight. Then take it fir a run at up to 50 mph and check the tyres immediately on return. A 5psi increase would be expected if the cold inflation pressure was about right. This was for road running, when off road the tyres ran cooler or at times would be dropped in pressure depending on conditions. So yours are spot on and reflect the correct cold pressures as recommended by MitsubishI.Finally got round to fitting mine today, at least to the cars tyres. First, I would say for any layman thinking of this, the job to fit and setup couldnt be easier. What I noticed at first use, that even on a very short test run, the pressures, not so much the temperature even on a hot day, went up rather quickly and higher than I would have expected. Im not sure how much difference the different types, makes and rubber compounds of different tyres make. As an example, I am running on BF Goodrich AT tyres, which are just a little short of full mud plugggers, and with 35 PSi in the rears and 32PSI in the front, after a relatively slow journey of 5 miles I was reading 39 and 35/6 respectively. Worth noting that the %age increase was higher in the front drive wheels, wonder how much difference the caravan will make to the rears. Its certainly an interesting thing to watch and basically learn what is happening.
It makes you wonder too, how much use infalting to the manufacturers pressure is when there is such a difference running.