30L workshop dust cyclone (stage 1) for less than 25€

Here is stage 1 of my latest project: a cheap workshop dust cyclone that SUCKS :-)
Stage 2 [is available at this link](https://www.thingiverse.com/thing:3759890).
I recommend you to start out with this one, though!

And this is what you need:

* a workshop vacuum to create suction
* a 3D printer that can do 18cm object height
* a 30 liters hobbock with 33cm diameter ([I bought this one](https://www.ebay.com/itm/170925876047)) for 20€ - if you buy two, you will have one left for [stage