Topside Module 1D CAD Model Posted on September 22, 2020 by graspengineering This is 1D CAD Model of topside module. It includes images (with different isometric views), step file of geometry. This CAD model is used for topside module analysis, refer below video: Post navigation « CAD-Quiz-3Obround Nozzle with Ellipsoid Head 3D CAD Model »