I'll start with my newest creation, a Yo-yo:
![Image](http://static.flickr.com/92/232137182_62657fb051.jpg)
You are dead wrong. I was trying to develop an hourglass but I used a "perfect" iris closure, so the top and bottom come too close, so the model did not fit as an hourglass, but only as a yo-yo. Then I modified the iris closure and obtained what I was looking for.Daydreamer wrote:I don't know how, but I've got the vague feeling that the Hourglass is a variation of your Yo-Yo