If like me, you have your P1P under shelving, the usual holder is too high to remove filament from the AMS unit.
I tried to mount the AMS directly on the P1P without any holder, it worked. But I realised that the PTFE holder on the hot-end kept clipping into the rubber feet on the AMS. So I cut the model down from the other version on here.
I printed at 0.2 Layer Height with 35% infill with supports. Printed in the orientation you see in the STL.
The author remixed this model.