Hi there,
about the 3D printing process, there is a lot a different type of technics regarding the material you want, the definition, the speed of print. Almost all the 3D print process work by creating the model layer by layer.
FUD (and FD) are bi-composant print. One is the resine you keep, the other one is just some wax which are working like a support (to manage cantilever....). You may find some wax on your print (and i will post soon a small "how to" about the best process i found to clean your prints).
The main idea when you design and print is to be sure you only have materiel where you need. So the best way to make your model affordable is to make them hollow. Which is the case on all this models (especially the blast one..it's just a 1 mm hull with some spicules on it). I will try to reduce the price like that but i already did a lot to optimize them. There is a 2 mm hole on the bottom to let the wax get out.
![Wink ;)](http://www.specialist-arms.com/forum/Smileys/default/wink.gif)
And Jimmyzimms answer on Shapeways :
Ahhh looking a bit closer at the 360 render I can see that it appears the bottom is separate now. You can understand my thinking on why I originally posted. Regardless, looking forward to nabbing some of these soon!