Hi jz4analytics,
That's great news about your score improvement. Since you brought up the comparison between this most recent CAT and the GMAC CAT, I'm curious about some of the details:
1) Did you take the ENTIRE CAT both times (including the Essay and IR sections)?
2) What were the Quant and Verbal Scaled Scores for each of these CATs?
3) Did you keep the 'variables' the same for both CATs (day/time of Test, location, taking the Entire CAT, using the breaks, test-like environment, etc.)?
These details matter when it comes to truly assessing your situation. You think that those 50 points came from SCs, but your post doesn't provide any evidence to support that. MAYBE those points are from your focus on SCs, but maybe they're not.
GMAT assassins aren't born, they're made,
Rich