Hate to admit it, but I have 12 gauge Model 12 retrofit and original Cutts guns in about every style of rib they put on them, as well as Model 42 retrofit Cutts gun in several variations. I also have a Parker SC grade single trap with Cutts and am considering building a .410 Krieghoff with a pair of Cutts Compensators. I have the gun, the barrels, and the 2 Cutts bodies. All I need is to find a machinist who can turn and thread my adapter rings.