Early 3d chastity model for printing

[sorry about the double post, I mistakenly posted to (Everyting Else..)]
I've been working on some 3d models for chastity devices that can be printed on a 3d printer or through shapeways or similar.
Here's a pic of a recent working model...



This is a pretty slow project (I have a day job), but I've gotten a couple prototypes of the locking mechanism made.
It's evolving, I've made the base ring a little bigger and tried to address some pinching possibilities..
The model is fairly well parameterized, so I can customize the dimensions pretty easily.

I would love to hear feedback or suggestions..
I'd also be interested to hear about experiences and advice on marketing chastity devices..

I'm not sure about the long term wear-ability/durability of many of the 3d printing materials.
The various plastics available at shapeways state that they are not 'food safe', and I'm not sure about the strength/durability.
The metal materials are probably usable, they come out a little rough, but could be ok..
Also not sure if shapeways would let me open a store to sell sexually related models..
they say No sexually explicit content.. are chastity devices explicit?
Once I have a working model, I'll order one and see what they say..

Let me know what you think..
Thanks

 

Here's the image:

 

Very nice! Yes I've seen that on there..
Good to hear!