I may be able to shed a little light on what you are trying to achieve. I myself am more of a car guy, previously being in the industry for 8 years working at a reputable fab shop building turbo kits alone with a plethora of other stuff we sold. I had the same idea you had at one time for my drag car. It is called a Neptune Tunerview. If your vehicle is not a Honda, I am sure you could still use the display and software in conjunction with a Arduino board connected to your sensors as inputs rather than to a ECU sending signals.
I have a few scroll wheel mice laying around the house, I took them apart and and noticed that all of them were USB and they seem to be pretty complex I found a really old PS/2 mouse with a ball (yea I know) and the board look simple. I'm going to meter it out when I get my "Hello world" test done.
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