Here's a very simple PTFE tube support I designed to suit my needs.

I recently added the S4 Sunly Dryer to my setup and wanted a PTFE tube connecting the filament splitter in the back of my X1C directly to the S4's outlets. Since the tube needs to travel a long distance to reach the S4, I created this support to hold and guide it, preventing it from being loose and flopping around.

The design utilizes a 15x5mm magnet to attach the support to the X1C's side panel. While the X1C's panels are made of aluminum, the metallic structure inside the machine provides a strong hold for the magnet. Additionally, the magnetic solution offers some flexibility for quickly adjusting the support's position.

For the magnet insert, you can use regular printing supports. If you print the part in the upright position as suggested in the 3mf file, you can choose to leave the supports on and use double-sided tape for fixation instead of the magnet.