I'm thinking about building a FDM 3D printer, but I'd prefer not to have to deal with filament. It's not just more expensive than pelletized plastics and restrictive of choices in materials, but it seems to introduce a lot of issues like tangling, breaking and picking up humidity from the atmosphere. When I've looked online, I've found a lot of DIY experiments, but not a proven product I can buy off the shelf. Am I missing something, or do I have to build my own?

Andrew Werby
Juxtamorph.com