Thanks guys!

The hardest part of the install will be pulling the shelter cover to get to the underside of the Honda plaque and routing the alert LED. I'm hoping to develop the low frequency (LF) communication so that riders can get a fresh reading just by turning the key to ACC. These LF communication modules will need to be mounted near the tires... and I haven't yet worked out how all that will come together.

I plan to use an in-tire sensor that will mount to the rim on the opposite side of the air valve. This creates a better tire balance and, more importantly, allows you to use tire sealer like Rideon and not worry about that stuff clogging the sensor. Like this picture from the Mobiletron manual.