I am sure I am not the only one who cannot easily access the rear of their X1C/P1C printers. I found the linked file but it was designed to work for the P1P which does not have the rear body panel or LED riser.
I have installed the LED riser found here - (https://makerworld.com/en/models/81856) one disclaimer - I used only the print files for the riser - I did not use the LED's they recommended - I used the ones from Bambu found here (https://us.store.bambulab.com/products/6500k-white-led-light-strip) that plug into the available USB port on the P1S/P1P.
This called for extending it 5mm for the body panel and 21mm for the LED riser - total additional extension of 26mm. Due to this additional height the PTFE tube did not easily line up so for the current printed ones I simply increased the length of the PTFE tube and looped it as seen in the pictures. I plan to modify this further, when I have time to simply connect to the existing PTFE tube under and to the left side of the spool holder. For now, I have run 3 rolls of filament thru the current set up with no issues on 3 separate P1S printers.
note: I replaced the existing 2 body screws with M3x16mm screws to hold the spool holder against the printer and 2 M3x6mm screws to hold the top piece over the PTFE tube.
Any questions, just let me know!
The author remixed this model.
Extended the height by 26mm total (above the body screw holes).