Fred this is amazing, even though the chance of me buying one is remote I am following this thread with great interest. Would it be feasible/possible to incorporate a TPMS function? I'm not encumbered with technical knowledge so it's easy for me to think big! I do know from my own work that expanding a project to have every possible bell and whistle is a good way to fail. There are lots of aftermarket TPMS systems out now that use a solar powered monitor that sticks to the top of the dash or plugs into the cigarette lighter. How cool would it be if TPMS could be a readout on your unit?
This is an example of one of the TPMS kits available -
