Well, well. Kate is discharged, but, boy, it sure wasn't easy.
Without focusing on the frustrating examples, suffice it to say that it took longer than expected, and this was followed by a delay in the arrival of the Oxygen Man at the RV. He was to provide a Concentrator, a machine to, basically, pull oxygen out of the air to supply Kate with oxygen.
But she's home and happy to be sleeping in familiar suroundings without tubes.
However, it's going to be some time before visiting sites and restaurants without a tank of O2 accompanying us.