geared or belt bontech extruder with integrated filament runout sensor

New version 10/2019 : belt version with integrated filament runout sensor
V2- files

You need :
1 belt 140 :
https://www.aliexpress.com/item/free-shipping-10pcs-3d-printer-belt-closed-loop-rubber-GT2-timing-belt-140-2GT-6-teeth/32383371438.html
1 pulley 16 tooth



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ORIGINAL post :

I modified the original one because the two part do not fit.

The needed material for this project is as follows:
1Kit Btech dual gears.
https://fr.aliexpress.com/item/1-set-P