I don't really understand the recent hate for CDP. All I used was CDP and I got a 25 on PAT, to me it was representative. You can also take the knowledge and practice you get from CDP and apply it to more difficult problems that come up on the actual test without that much difference. Just my two cents. Do the 10 tests, you should see improvement. Develop your 3 dimensional assessment of objects for keyhole and TFE especially, some on pattern folding. I wouldn't recommend line counting as it doesn't always work and it takes away from your perceptual improvement.