This is a preview of the medium FLEXTRUDER2 extruder with 25 tooth geared wheels.
This design has a side-opening lever: It has 2 advantages:
* The gears stays nearer to their designed gear-center distance, whatever the filament diameter.
* The gears are lower, less distance between the gears, heat sink and hot end.
See the FLEXTRUDER2 S project for more information about this concept.