Hi davidqlam90,
A 550 and a 500 aren't as different as you might think they are. When you took your CATs:
1) What were the Quant and Verbal Scaled Scores on each?
2) Did you take the ENTIRE CAT (including the Essay and IR sections)?
3) Did you take them at home?
4) Did you take them at the same time of day as your Official GMAT?
5) Did you ever do ANYTHING during your CATs that you couldn't do on Test Day (pause the CAT, skip sections, take longer breaks, etc.)?
On this last CAT:
1) How many questions did you get wrong because of a silly/little mistake?
2) How many questions did you have to rush through at the end of each section?
GMAT assassins aren't born, they're made,
Rich