We greatfully acknowledge the assistance from Sunward Aerospace Group Limited.  Sunward is a leading manufacturer of model rockets and parts.  Parts are perfect for the scratch and clone builders.  Also included in the product line are siege engines including wooden Trebuchet Kits, Catapults, and Ballistas.  Sunward also makes a simple paper Telescope Kit for use in classes and science projects.  Products are available online direct from Sunward or from retail vendors and online sellers.  Please visit: