I just purchased a new Shimpo slab roller and the book From A Slab of Clay. I am concerned about whether or not to rotate or flip the slab after each press. Mr. Baird says that some people say it doesn't make a difference whether you flip or rotate the clay. I have read the section on how to use the slab roller and know what he says and I have no reason or experience to say otherwise. The people here are all very smart so I was wondering what comments you guys have regarding flipping or not. Thank you in advance for your thoughts and comments. One comment, I have been throwing for about one year so I am not the brightest light bulb in the pack ----------- yet, but am anxious to learn all I can.