You will need a dremel to enlarge the hole where the original hotend went, to make room for the new one.
The purpose of this design is to be able to use the original effector and arms of the super racer, while also being able to utilize the benefits of the smart effector.
The main body has 3 holes on top for M3 heat stake inserts and then you secure the smart effector to it with M3 screws.
The bottom of the main body has two more holes for M3 heat stake inserts and allows the assembly to attach to the existing effector with two M3 screws.
The fan shroud has 2 holes to insert M3 brass heat stakes and then you secure the shrouds from putting the screws in from the underside of the smart effector.
The author marked this model as their own original creation.