This device sits on your Next Engine scanning platform to help you get the best quality scans. It works by providing extra geometry to increase alignment accuracy. This is especially useful for scanning objects that have a very regular shape like a sphere or a cylinder. It also helps with manual alignment by giving you recognizable reference points. This version has been volume-optimized for the lowest price. If you have your own 3D-printer you can download a solid version of the tracker for free at Thingiverse.com Here.