Regarding the storage, the intent isn't to store the device long term, I've encountered skills erosion before and don't like doing stuff twice if I don't have to. But the realities of my work are that every other year or so I do quite a bit of travelling for a few months. Then there's always the very real possibility of needing to go to one of the remote areas we have locations for a long term "temporary" assignment, often a place where the fresh water isn't and checkpoints can spring up instantly. Not a place I'm going to take a Rebreather.
If it's as simple as cleaning and storing in a cool dry place then taking a refresher course on return, all's good.