E3D Titan Extruder Upgrade for Prusa Steel Igus bearings

I'm building a Prusa Steel v4 3d printer with a 20x30 cm printbed. I will use a Titan extruder from E3D, a short body Nema17 motor and Igus bearings. The Igus bearings are very sensitive to compression so they will stick very easily. I used the excellent E3D Titan Extruder Upgrade for Prusa i3 from GyroBot as a base and changed to geometry of the bearing holders to be able to use Igus bearings. I used a 2.3 mm drill and an M3 taps to make the threads. I use a short body Nema17 motor and the weig