This is a simple PTFE tube adapter mount kit for the Elegoo Neptune 4 Pro. It requires no hardware, except what comes with the 3D chameleon, and the original screws that came with the printer. It rests over the inlet for filament, and screws in to the preexisting screw on the extruder cover. To install the adapter piece itself, simply thread it into the pushed out circle, as straight as possible.
V2.1 Update: The first version would push up on retractions, and wouldn't allow the 3dChameleon to properly print, due to the rotation. This update adds the 2nd screw mount , to remove any rotation, and to increase strength. It is also thicker on the top, so that it can be printed with thew PTFE hole face down. This new design does sadly remove the functionality of the filament release, as it block it, but I will try to revise the model soon.
V2.2 update: I took the V2.1, and made it wider on the right side so it would hit the switch in the switch mount I designed. This mounts best with the stock screw in the right and one of the long, black M3 screws from the 3D chameleon kit screw bag. This piece prints best with the "arms" on the build plate, and supports on build plate only.
Switch mount: The switch mount is a simple design that tightly wraps around the left belt tensioner. To install, first unscrew the plastic nut on the end of the tensioner, then slide the adapter's hole over the screw protruding, and wiggle it until it effectively wraps around the tensioner housing. After this, simply use 2 of the short M3 screws from the 3D chameleon screw bag to mount the switch, with the plug facing downwards.
Bucket (I did not design): https://www.printables.com/model/611113-elegoo-neptune-4-4-pro-waste-bin