I really liked the idea of combining the spacer and leading for the PTFE tube. But my P1S has a small knob on the filament holder. So I made a small modification to make everything fit nice, tight and flush.

Recommended settings
Material: It's up to you, I used ASA
Layer height: 0.16
Perimeters: 5
Infill: 60%
Infill Type: Gyroid (or something similarly strong)
Supports: No