Looking for an extended choke for my Nova 12ga pump. It is my "extra" waterfowl gun, and I am having trouble finding a good, mid range extended choke for it. The Carlson choke that fits Benelli fits very oddly into the gun because of how the choke is threaded, and I am not liking it. Does anyone out there use a Nova and an extended choke that you like? All suggestions welcome! Thanks all.