[fastd]

olddog,
Excellent points.

My experience is that most engine tuners don't have the patience to do it right; a couple of WOT pulls, add power valves and they are done.

I think an adding air/fuel gauge is never a bad idea, it looks cool and can make you your own best tuner - the only downside is that you have a tendency to stare at that thing when you eyes should be on the road.

Changing the jets, power valves, etc. is not very difficult and kinda fun if you can move your ratios in the right direction.