On the MK3s, the X motors are closer to the frame than on the Bear Mod. Therefore, I had to adjust the upper bracket to create enough clearance. @SonicBroom has also created a solution for this but I don't want to deprive you of mine. On the RMU side of the bracket two heat inserts are needed. Furthermore, the single cable clamp is required, since the holder runs exactly at this point. If the RMU is used, the X-Motor cable must be routed into the Einsy Case at a different point anyway. I have also created a remix for this.
Happy printing!
The author remixed this model.
Modified to create more clearance.