Since the P1S has a shallow curved bottom for the smaller mounting hole, I modified the X1C mount to accommodate this. Tested the placement of the mount and the hygrometer is perfectly angled and illuminated with the stock P1S light.

You can now easily monitor temp and humidity, even with the build plate fully up on layer 1, which some overhang mounts did not allow. This is also better than the door mounts which are hard to see with the black glass and not able to be remotely monitored with the camera.