I have just worked on stock injectors so far, haven't had a need to modify the IFR, pw, etc tables yet. But, a few people on here have really stressed the importance of this data (Howard, Greg, Joe, others Im forgetting) and after seeing this, it just makes me even more of a believer. Over the years, Ive watched guys struggle to get their tunes dialed in on this site and it usually ended up being their modified injectors.

ID has made it really easy to get the correct info, Ive never personally used their stuff (yet), but since they provide all of the data to plug into a tune it makes a tuner's life a lot easier!