CAD drawing

I require a CAD drawing of a design. The design is an existing product from OKW. The task it to create a 3-D design from the existing dimensions and make some modifications to it such as adding a USB port etc. I do not have a CAD pakackage so I will need something that I can view in a free viewer. I would like to discuss the project in skype prior to commencement so that the task is fully understood. ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Employer will receive exclusive and complete copyrights to all work purchased. (No 3rd party components unless all copyright ramifications are explained AND AGREED TO by the employer on the site per the worker's Worker Legal Agreement). ## Platform Unsure of the CAD package to be used but must be viewable in a free viewer