E3D Hemera Ender 3 mount/adapter

First of all, this is based on https://www.myminifactory.com/object/3d-print-ender-3-e3d-hemera-mount-105802 but is a complete rework with lots of modifications.

Things you will need:

4 x original Hemera mounting screws
If you're using the BLTouch:
2 x M3x10 bolt
2 x M3 nut
2 x M3x8+ bolt (to hold the BLTouch itself, can be longer than 8mm)
4 x 2.5mm zip tie

3mm drill to open the holes (spares to use supports except for one hole).

If you want to use the fourth hole, you will need to modify the original roll carriage of the Ender as is shown in the pictures. You can use a 5...6mm drill to do this. Then take a black marker and paint it :-)

Assembly: Put in the left two Hemera screws and mount the printed part onto the roll carriage using the original screws. Leave the lower adjustable screw very loose, mount onto the X rail of the Ender 3. Then mount the Hemera - you will need ball end allen keys, see picture - and route all cables. Mount BLTouch holder and BLTouch. A