Altering your current 2D drafts including standard change in materials used and manufacturing details. 2D exploded views of an assembly. Engineering change request (ECR). We can convert your existing physical components into professional 2D draft designs or drawings by utilizing the reverse engineering methods. From 3D models, we can offer you multiple projections including orthographic, axonometric, and perspective projections. 2D details from 2D assemblies or vice-versa. BOM ( Bill of Material ) services.