Flatness cannot be guaranteed. An unavoidable result of the production process is that the widths of these panels can indeed vary from board to board.
Complete boards and custom sizes of pine plywood are not available by delivery. The material has very high raw densities so that packages quickly become extremely heavy as well as large. This weight and size and the danger of damage during delivery meant that the handling process was extremely complex and it was also necessary to ship per forwarding agency. The resultant cost became too high to be attractive for our customers. However, pine plywood, including in custom sizes, is still available at our store in Berlin.