oilspot

As another option to the  "hanging hands-free-shower," I attached a steel mending plate to the exterior wall above the shower.

Then all I have to do is take my extra shower holder (which I expoxied to a big magnet) and stick it into place.

The height is adjustable (+/- a few inches), it is quite small, and easy to set up.  The mending plate is very flat and doesn't interfere with set-up or takedown.

A good source for the maget is a welding store.  You can purchase a large "grounding" magnet and remove the grounding bolt from the center.

I can take pictures if anyone needs a visual...