This is my own redesign of SeeMeCNC's EZ Struder. I designed it to have a tighter filament path near the drive rollers, have an inlet guide, and to combine the three molded parts of the original into a 2 layer assembly.
The design originated from the manufacturer's original STL files at github.com/seemecnc
A second set of files has been uploaded that is compatible with the E3D bowden style adapters. http://e3d-online.com/E3D-v6/Spares/Bowden-Adaptor-1.75mm-Filament It's essentially the same thing minus about 1mm to fit the dimensions of that groove mount snugly.
V2 Base Plates uploaded. A few people reported that the spring perch was breaking off of their prints, so I added a gusset to both versions of the part. (photo above)
V3 Files uploaded. This revision adds a touch more rotation to the tension lever for squishing flexible filaments. I'm happy to report that I have successfully printed full blown NinjaFlex with this revision of the extruder body!