--we've been experimenting with lifts on the left side.

Been using different thicknesses and "sponginess/give" levels, trying to find an optimum situation. One thing that's annoying is that the lifts tend to move around in the shoe as one walks, not staying that well under the heel, and I've been trying to rig a velcro or other non-permanent fastening system for that, as one doesn't want the lift permanently attached, so one can shift it into different pairs of shoes.