There are many reasons why firms need to model the exterior contour of existing aircraft OMLs (Outer Mold Lines). Most aircraft flying today were not designed in a modern 3D CAD program. Even with a current 3D digital design, the actual as-built contour deviates from the intended shape, at least at some level. Direct Dimensions has used a wide variety of 3D measurement equipment and software for nearly 15 years to accurately capture and model these shapes for many different applications and purposes. This presentation will focus on the evolution of 3D scanning equipment and software through many examples with emphasis on practical application, costs, schedules, deliverables, etc. Having real world customers that demand higher quality and lower price over time for this application, Direct Dimensions has continually searched for the best tools and methods for performing these projects. This experience and perspective will be freely shared with the audience in order to develop an appreciation for the selection of such tools for these projects.