Here is the thingiverse data on Lyman Filament Extruder II
http://www.thingiverse.com/thing:34653He has also developed a filament winder:
http://www.thingiverse.com/thing:30705Here is another forum chain that I have monitored and contributed to. It is the thread on building an extruder.
http://www.soliforum.com/topic/557/fila ... -filament/It is 39 pages long but has some very informative info in it. Here is the first photo from the thread
Here is a photo of the filament that the lead person "elmoret" made using the "Filastruder"
He made everything but the blue filament.
Bob Teeter