I ended up reprocessing the six quarts immediately after my last batch was done. They were still very hot, so I just placed them in the canner, which already had the hot water from the last batch, and re-processed them at 11 pounds for 25 minutes. I didn't have any breakage, so I think the fact they were still very hot jars was the key. My plan B was to put them to empty them and freeze the stock.