Cartoonist Joe Wos is attempting the world's largest hand-drawn maze and hopes to complete it in the next few months.  The writing is on the wall: Joe Wos is halfway to setting a world record for largest hand-drawn maze.  Wos, a Pittsburgh-based cartoonist and performer, started his long, twisted road to the amazing record on July 27. Since then, he figures he's spent 40 hours creating a maze that, when finished, will be 35 feet long and 4 feet high.   He also needs someone to complete it, because, after all, what good is drawing the world's largest maze if no one is going to attempt it?  At first, he had no takers from his friends and family, but as word has gotten around about his efforts, he's starting to get folks willing to devote as many as 40 hours to finish the maze.  "I've received 20 emails from people around the country wanting to solve the maze," he said. "I'm thinking of taking it on tour and letting one person in each city attempt to solve it. Of course, I'd use a plastic overlay so people aren't drawing on the actual maze."  If all goes well, Wos will set the Guinness world maze record by the end of the year.