The twins were not satisfied with the results of Location #2 and have decided to repeat the trial.
New finding: having no shoes allowed for an exclusive performance of “Head, Shoudlers, Knees and Toes” with an extended clapping medley in the middle. Kitchen location is back under consideration as an ideal storage place.
After some further loud discussion a seventh test location has been added. Parental Unit #1 said she just gives up, just keep the shoes out of her way and it meets all of the twins requirements for shoe storage (inconvenient, messy and leaves performance space open). It is now the permanent location for shoes. Until further experimentation ensues at least.