I found once I added the risers for the lights to my P1S, the PTFE tube internal to the printer was getting hung up on the ledge on the right whenever the print head would go all the way to the right. It would hang up and then “click click click” as it banged on the ledge. I printed a couple of guides to try out but they had a sharp bend, causing more force to be needed to pull the filament through the tube. This design has a longer arm which allows a more gentle bend, solving both issues. It is also low enough to fit under the ledge, so it won't collide with the ledge when the machine homes.