cad draughting and bureau service All our work is developed with Mechanical Design Software and converted, if necessary, to any required 2D or 3D formats including SAT, STEP, IGES, DWG (native) and DXF. O'Leary Associates offers a range of services from 2D Draughting through to the 3D modelling of components and assemblies. We provide a quick turnaround for 2D to 3D CAD conversion for companies that need solid models but lack the systems, trained personnel or the time to accomplish these tasks themselves.