For the redesigns of the extruders out there. The single was originally designed as the upper. If you need it I can modify to work with both.
The plate snaps into my bearings tightly enough to not need zip ties. It feels strong. There is a cutout on each if you want to add a tie.
This needs to be printed on its side for strength in layers. The side that goes down for the print has ramps for the belt holder so no support is needed.
Re-designed for bolt inset and for less support for the zip tie holes. The other file has the zip tie holes deleted (no zip).
There is a 3rd file. It is a backing plate for raising the extruder up 1" if you lift your bed for a larger print area.