I went to the store to stock up on PTFE tubes for the P1S. I guess I should choose the second option (selected)? Mine came with a 550 mm tube and a spare of the same size. I wonder what the 370 mm one is for—something AMS-related?
Why didn’t I think of asking ChatGPT instead of posting on the forum? 
That tube isn’t needed if you’re using the default spool holder on the back of the printer like I do.
Yeah the shorter one is what goes between the buffer and printer.
I’m a fan of long swoopy curves and minimal breaks in the tubing.
Those long loops help minimize friction which minimies wear in sections of the tubing.
My tubing runs go from AMS to hub with no breaks and from the hub to the extruder with no break in that line either.