I don't know 2 or 4. Ease of ordering vs more data display area. how about keeping gunio 1.0 simple and get the 2?
it isn't much to work with though, but it's cute
some examples, (the *'s are buttons outside the LCD area)
Code:
INS 045mpg mnu*
*< CUR 047mpg >*
INS 045mpg mnu*
*< TNK 045mpg >*
INS 045mpg mnu*
*< INS 2200rpm >*
not married to it, just putting it out there as a starting point.