which would be better, trick the computer to think its at a higher elevation, that it's hotter than it actually is, that it's richer than it actually is or all three? i know the 02 sensor is a must because that is the feedback to the computer's calculations. so which is the other trick that has to be made, on one hand i think a more simple trick would be more reliable (murphys law), but tricking more sensors in smaller increments would be more accurate and take less 02 deviation.