I have re-designed the original pressure bearing holder, after 2 years of work the filament wasn't pushed with enough power into the nozzle.
With this mod you can set the pressure using the M3x12mm screw.
All you'll need are 2 M3x12 screws. One to hold the beraing and the other to create the pressure.

The two original M2.5x8mm will hold the part in place, like the original part.

I reached a point I wasn't anymore able to print.

Please feel free to post your comment and/or suggestions.