We had a dashboard this year, and it was really used a lot more for debugging than during a match. The only data we actually would look at -during- a match was our shooter RPM and the camera feedback data. The rest was just nice for testing and before the match. It's always good to make sure the battery votlage is above twelve before a match starts
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Make it easy to read. Important/quickreference stuff big, less important stuff small. Design for your user; ask the drivers what they want.