There is a lot of misinfo on this ball.
Concerning coverstock: everyone I know has said it's powerkoil 18. However Neo-tac insists it's similar to PK18 but it's their own blend of resins that are a little more aggressive.
Concerning weightblock: There are 2 different pictures I've seen. Both very different. The first was from neo-tac's original .PDF on the ball. It showed the ball having the same lightbulb core as the old LT-48 Gold as seen here:
http://www.bowlingballreviews.com/images/balls/571-c.jpgHowever they have since changed their tune & now claim to have a mushroom type core similar to the Monster series as seen here:
http://www.bowlingballreviews.com/images/balls/1872-c.jpgSo, I guess It's anyone's guess as to what is actually inside of the ball, but I'm going to guess that they decided to switch to the mushroom core for one reason or another.