RE: Difference between NSRCA and IMAC?
What he means by "present" is the factors that effect your score that shouldn't. In other words, the wow factor. It can and has been argued that small planes score poorly when compared to larger planes even when flown exactly "by the book". I flew a 72" plane and did quite well in Basic class. There were a few big airplanes that I beat.
The biggest thing effecting your score is practice. One of my club mates said practicing was cheating. That made me laugh.