This extruder is a remix of the Bear Extruder for the Copperhead hot end made by Slice Engineering with the addition of the bondtech idler lever arm. I made models for both the groove mount and screw mount variants and will fit the MK3S and MK2.5S. If you are looking to buy a Copperhead hot end, I would recommend getting the screw mount variant and using the T-Attachment component. This locks the hot end in place to prevent it from rotating. Assembly is the same as the bear extruder, except you will be using a hex nut in place of one of the square nuts.
Groove mount
Print the following files:
Groove Mount Extruder Body
Groove Mount Extruder Cover
Either the MK3S or MK25S X Carriage
Fan Shroud
Bondtech Arm
Screw Mount
Print the following files:
Screw Mount Extruder Body
Screw Mount Extruder Cover
Screw Mount T-Attachment
Either the MK3S or MK25S X Carriage
Fan Shroud
Bondtech Arm
You will also need Thumb Screw Assembly
https://www.bondtech.se/en/product/thumbscrew-assembly/
or
https://www.printedsolid.com/products/bondtech-all-spare-parts?variant=22855596834901
The author remixed this model.