The long-distance Extruder

Hi,everyone!This is a extruder for long-distance feeder.
It needs the following parts:
-1pc M3 screw length 35mm
-1pc strong spring length 20mm
-3pcs M3 screw length 20mm
-1pc M4 screw length 15mm
-several M3 and M4 hexnut...
-1pc 4x14x5mm deep groove ball bearing/or the same specifications u groove bearing
-the best extrusion wheel you think of
-1pc air chuck of M5 screw thread
note:
base is 25%-30% infill printable without supports,
arm is printable with only extern