Prusa extruder

The problem with printing flex, with the original prusa extruder ( White extruder). Made me make a improwed one.
All non plastic parts from the original extruder are reused-And you only need :
1 30*4mm steel bolt
1 4mm hexnut
1 4mm acron hexnut

I aded a improved extruder back side. With larger exit hole for a 3/2mm teflon tube, and more gab for the spring

Print with pla 90 % infill