bowden fitting adapter (PC4-M6 to PC4-M10)

Bowden fitting adapter PC4-M6 to PC4-M10. It allows you to fit PC4-M10 (hotend) fitting on the extruder side. It might come handy if you find your self in the situation when you only have spare PC4-M10 fitting and don't have time or don't want to wait for spare parts to be delivered (in my case all cr10s original fittings gave up quite fast and had only PC4-M10 aftermarket ones laying around).
It was tested on cr10s. After printing it needs a pass with 2.0mm drill bit to give it a bit room for