Dear Mike,
I’ve been reading with interest, but one thing seems to be missing. As time goes by, the constant changes, presumably because of air leakage and expansion or contraction of the inflation air due to temperature change.
So, if I read correctly, you began with an unstated tire pressure and took more or less daily calibration readings, recording time and temperature as you did so. You did not do any inflating during the process. I see constant recorded by date and I see it recorded by temperature, with various corrected constants.
It would be a boon to see a chart of date, time, constant, and temperature shown without correction – in other words, the original recorded values. This might help me get my head around the figures.
I may have made a ridiculous mistake, and I will not be at all offended if you point it out, but nowhere do I see original recorded data.