Perhaps when I finish all twelve of these monthly books, I may have learned the drop spine-drum leaf binding. Tipping-in remains my biggest challenge. In this one the back end paper is off 1/8th inch horizontally. Also, the printed bookcloth cover smeared during my first attempt at making the casing. Another was printed and allowed to dry over night, then I taped a piece of waxed paper over the text to protect it while working.