Shirmoor,
The Sewing Revolution is a round template, that is marked in either 5/7 or 6/8 divisions that helps you mark out stars, triangle, pentagons, hexagon etc., quickly. Or find the EXACT center of a circle or arc.
They have two different templates, the 5/7 which would make 5 or 7 pointed stars or sided blocks, or 6/8 for 6 or 8 pointed stars or sided blocks, so there aren't too many marking to confuse you. Then they have extenstions so you can make larger blocks or stars.
[url]http://www.thesewingrevolution.com.au/the-sewing-revolution.php
It looks like it would be a great tool to have, for embroidery placement or for designing blocks for quilting, but for the price they are asking, I'm not sure I would get that much use out of it, which is why I was wondering if any one has one, and how useful it is.
Diane