Max was found at the craters. Micro is also there.
And Totel. Oh, they are torturing him! There is not much you can do now. Go visit the carved head.
Unlike normal walkthroughs, in Nice Game Hints you can select just the puzzle you want hints for. Here are listed the puzzles for "The craters" in Mutropolis. The guide you choose only contains information about that puzzle, reducing possible spoilers for other puzzles.