I have printed the oryginal v6 version of the extruder by Infantryman. It worked properly, but the mount was a bit flimsy (the whole body was moving back and forth a bit) and I did not like the tension screw being on the bottom with not very easy access. I have filled up the space designed for the spring and instead added a cut for a square nut. Now the tension spring and screw can be installed on the top cover with easy access. But you will need M3x45 screw (maybe even a bit longer if you want really light tension). I have also made the mounting screws cut-outs 1mm shallower to give those screws a touch more grip and stability. Fits nice now and can be adjusted on the fly.
The author remixed this model.