PET mini-shredder

Version 2 is here!
(see at the end of the description)

This is more or less a copy of the "Mini-shredder/Mini-filetador" from Takashi Utsumi

It is designed for wider blades:
Width: 18mm - Thickness: 0.5mm
The cutting edge length: 100mm
(the whole paralellogram is longer)

Links to the original:
http://www.utsumi.com.br/pet/English/filetador/index.html
http://www.utsumi.com.br/pet/English/dicas/minifiletadores_como_fazer.html
http://www.utsumi.com.br/pet/English/

Possible uses:
1) Weaving -- Make cool woven objects like those described on Utsumis pages.
2) Directly feed it into a hot end (to be designed) for printing (The melting point of bottle-PET is below 260°C edit: I sucessfully printed with 250°C)
http://blog.reprap.org/2009/03/drink-bottle-feedstock.html
3) Feed it into into a re-extruder to make 3mm filament for bowden printers.

After some testing with version 1 it is clear that PLA is definitely not suitable - the friction heat cuts right t