be careful with pretest. It has at least 7-8 wrong answers when I used it several years ago. I dont know if they corrected them yet (if they have a new recent edition, I hope they have), so make sure you double check all the answers if you do use pretest. I used to have the question numbers along with the real correct answers written down, but I have since lost that information. I would stick with blueprints and nms.