Will the nickle 10rd magazines fit the 880? I've got an 880 with two 7rd mags, but am always looking for more. Everyone local to me has dozens of the 10rd mags cheap, but the 7rd are a few bucks more.. :? Add to the confusion I vaguely remember someone mentioning custom made 5rd mags that were flush fitting.. So if anyone has an answer to either where to find 5rd or if 10rd mags fit I'd appreciate it!