BondTech Mini Extruder with PC4-M10 fitting

I have made a modification of Bondtech Mini Bowden Extruder for Raise3D N2 from http://www.bondtech.se/en/products/freebies-stl-files/ to fit PC4-M10.
I'm using this with Bondtech DualDrive gears for 1.75 mm, you can buy them from Bondtech, or from Prusa (needs right to buy spare parts).

Modifications:
PC4-M10 Pneumatic Fitting
Better cooling
Better filament loading (may cause problem with flexible filaments)
More space around gears
Space for M3 nut

Edit 2018-11-27:
This extruder