Fantastic post. I spent a year as a logistics officer in the air force in 1985 and remember going to a showcase Ford warehouse where the picklist was printed by a mainframe and the forklift driver had a barcode reader hooked up to a walkie talkie that could talk back to the mainframe, so that stock levels were kept updated. That was jaw-dropping then. Your detailed post shows how you have taken the process to a whole new level.
When's the YouTube video coming? :)