Brian,
I friend of my showed me how this program
(magics) worked in combination with rhino40
It came with a Perfactory Envisiontec System

Personally when i browse a site i now already
what i am looking for and won't waist any time
for other things on the site(kind of lazy)

rayman gave me some keywords: jeweler,rings,rapid
prototyping witch made me think of deskproto
and then magics

programs like magics are essential because the STL file
must be absolutely closed

with minimagics(free download) you can analise
if the STL object is valid or not

When you draw complex forms in rhino40 it happens
quiet often (due to experience) that they are still open

So rayman can check his models before he sends them
to his friend