decorative_cover.stl This is a knurled cover to go over the hex nuts on the top and bottom of the fitting. it enhances the look and feel of the fitting by giving it a colored accent and making the bare metal easier to grip with your fingers. (print two of these per fitting)

threading_tool_small.stl This is a small tool to help thread the lemon onto the PTFE tube. it is shaped like a nut with a hex opening in the center and a knurled outside edge for easy gripping.

threading_tool_large.stl This is a larger tool for threading the lemon onto the PTFE tube. it is shaped more like a screwdriver with a hex opening on one end and a handle on the other.