Thinking of a new gadget...

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The mind keeps wondering and comes up with new idea's, when i wanted to read my o2 sensor i had a green led display voltmeter on the brake master cylinder, it was not usable in sunlight and i had to put a black tunnel over it to make it work.
However it seemed a good place to mount an accessory display, nice flat surface and even possible to replace the cover with another one drilled or glued or silicone sealed for the job and can be very easily removed.

Another option is using the brake light switch for manual input to the display for scrolling purposes, you could program the display so it would respond to a series of quick pulses from the brake lever as opposed to longer brake operation by tapping into the 12 volt switched wire from the brake microswitch nearby, possibly using the 12 volt supply to the switch as well, in a stretch the switched brake light wire could be made to provide the 0volt return supply as it connects to ground through the 21 w brake light which would then double as a "broken brake light lamp" indicator, this would include some cleverness with a capacitor and diode to supply 5v to the unit for the duration of the quick pulse and maybe providing optical feedback through a segment of the display ......