Unfolds in Pepakura If you are designing ships then before doing your unfold checks you must put a scale mast height into the mesh just a thin cylinder and leave it in the drawing for good, Pepakura appears to be relative to HEIGHT. Use Maurice's box to work out the scale. First off unfold everything then go to the scaling factors and WRITE DOWN the decimal fraction given there, so far this has always allowed me to keep a constant scale every now and again Pepakura seems to loose it and the top number in the box does not always get you back. Now you can just do selected bits and stay in scale. If you are designing a small detailed part such as a 3" gun in 1/200 th scale open another Metsequoia sheet design a big one with all the details you want. Copy it Paste into the real mesh and scale it to fit. When you unfold it throw away the bits that are impossible. load of rubbish as usual!!!