That's very impressive! Which prep test have you taken so far?(e.g., pt 52-71) If it were more earlier ones(pre-70), I'm positive that there is a lot of rooms for improvement.
Is this version ready to ship? I have all hard copy of PT 50-80, and I just find that the single PT 81 is still pre-order. I prefer to buy PT 81 only to save couple of bucks... and I just feel better when the book I have to open looks thinner. haha ;)