"He who marches out of step hears another drum." ~ Ken Kesey
I'm sure it's different for me since I am printing on a manual with only 4 pallets to changeover, but changing tape really doesn't take very long usually. I use textac, and for hoodies I can maybe get two printer per pallet before they are shifting like crazy, and thats assuming the glue is fresh and really piled on. I just think the time involved in cleaning pallets every two pieces is more than changing the tape at the end of a run, but again that's for my setup.
We are flashing for that matter using two flashes, so how does that help?