c&l maf transfer file vs using stock maf transfer file

I know of a person that just bought a tweecer. He is using a c&l with the blue tube for 24lb injectors. He is able to run his c&l with the tube and run it with stock computer just fine, like any c&l meter. It is my understanding that it will run better with a flow sheet and ahve those numbers entered in for his maf table. Is this so? I spoke with a guy from c&l and was told that if I or anyone were to enter in the numbers from a c&l flow sheet that it will cost horsepower. Can anyone verify this? Is this true? Sounds like crap to me but I wasnt sure. I am using a pro-m setup and so I have no use with calibration tubes.

That is what I always thought. When I spoke to this guy from c&l, I was talking to him about using a tuner with the meter and he did say that if I wanted one he could send one but it would make it run worse. Who knows.. All I know is if you go into tweecer there are a couple c&l maf transfers.