Thank you very much !
I have been investigating this and yes those wax plots use stl files
but most of the service stations that do prototyping also do the conversion
from 3dm to stl for you !They even have programs to look for problem regions in
the files
Peter

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

Thanks very much just downloaded minimagics !
Looks like its what I was lookink for...
Peter

Peter good luck...
DannyT thank you..