To view this Online Extra, you’ll need Google SketchUp. You can download SketchUp for FREE from Google.
There was another Online Extra for this article:
Issue 105 Online Extra
Heirloom Calipers & Dividers Set Model
With some simple tools and a little time, you can build a complete set of quality layout tools.
This 3-D SketchUp model is available to download in this Online Extra.
(See download link above)