Filament cooling fan for Overlord 3D Printer

Some people have issues with the filament getting warmed up by the extruder steppermotor. These 2 parts allow mounting of a 50mm fan in the filament compartment. It will provide some cooling, though i cannot confirm that it will fix this problem because i cannot reproduce it. I used an old 50x50x10 fan, i'm going to try a 15mm one later on.