Curve Maker now draws the Ionic Volute using the formula proposed by Andrey and Galli (see: http://www.springerlink.com/content/r61qh2354m56qt31/ ).
Optionally, you can draw it with or without an "eye".
You can download the updated plugin from here: http://www.drawmetal.com/download
A demonstration video is available: http://www.youtube.com/watch?v=mES14SnIAP8
For those interested in drawing an Ionic Capital, using Curve Maker and Taper Maker together may be useful as shown in this video: http://www.youtube.com/watch?v=oxXdXy9Gdes
Edit 2012-07-04:
This version is recommended for all users of Curve Maker because it also includes a bug fix. In some circumstances, the plugin would incorrectly determine the drawing plane and draw the mirror image of what should have been drawn. And curves should redraw a little bit faster following any edit made using the Measurements box.

