Bad extruder and fans


I’ve tested now many different materials and upgraded with a heated bed it seems to
be a very nice printer.

But there are two (big) problems with it:
At first the fans are at a incredible low quality but they’re easy replaceable…

The real problem are the not very well constructed extruders. At first the distanze between
the wheels and the filament guidement is unneccesary high which causes in broken filament
in some case. Annother problem is that its not possible to adjust the contact pressure,
so that theres no way to prevent relative soft ABS from beeing deformed.

Could you please improve this design and upload it to print or something like this?
I would improve it by my self but therefore I would need the CAD data of the extruders plastik parts.
Could you please send me them?