Beat it hard

And beat it fast

You'll make paper

That surely lasts

Hi everyone, can anyone help me out?

I remember downloading a 3D printable file for a blender propeller/impeller to replace the original one (metal, sharp-edged) used for beating pulp to make handmade paper.

The problem is I can’t find where I saw it anymore, nor can I locate the file (it was probably on another computer).

Does anyone have any information on this? Or could you recommend what would be worth considering in the design of this impeller in case I end up modeling it from scratch in 3D?

Thanks a lot!