Screwmeter - Screws mesure tool (obsolete)

**This version is obsolete. I made a new one with many changes. Forget this V1, go to the new one and enjoy !
Go there : https://www.thingiverse.com/thing:2662907**
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Hi friends,

I don't know about you, but I'm unable to evaluate the good size of the small screws I use for my Geetech I3 Pro B. So I decided to make a gadget for that.
There are 2 pieces. One with the scale and the other with holes where screws have to be inserted. Then you slide the second until t