Hi everybody, at the end of May I ask if someone already have built a plastic shredder with aluminum blade, or if it is possible. After that I try it myself here in Cambodia, and now I have my aluminum shredder.
Because my aluminum sheets are not very flat I was forced to have space between the blades. But at the end it’s working.
I have done a video of my shredder construction:
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wow never seen an aluminum version before! Pretty cool you tried it out, does it shred properly? And well done on the documentation video 
Can we have your location so we can pin you on the map?
wow. great work!
I think one thing you can do to improve the shredding is also the configuration of the blades. Try to put them in a real spiral instead of in a block of 3-5 elements.
We had done that mistake at the beginning, and when we changed them to spiral it started to shred beautifully (until we found the next 200 mistakes 
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Thanks @davehakkens! The shredding is no perfect due to the space between blades. It just takes more time to have small plastic pieces.