The 3D Warehouse tools by Cadman provide a suite of tools to Quality Check your models for managing and reviewing SketchUp models prior to uploading those files to 3D Warehouse.
Draw a centerline based upon successive triple point selections anywhere in the model. Draw to a single point, a centerpoint from 3 pick points, or a midpoint between 2 pick points
The Sandbox Bonus Tools by Cadman add to the functionality of the Sandbox tools. The Sandbox Bonus Tools make working with terrain more fun and interactive throughout the entire design process.