Each order requires its own kit. You may send multiple kits in a single package, but please ensure to mark each kit clearly. Parts mutually used on two or more jobs should be clearly marked with a sticker or other marking to denote that the parts are shared, and indicate the projects they are used on. When using mutual parts, remember to provide an extra 5% for each project. Forgetting to include the extra 5% for each separate build is the biggest blunder.