Anthony, I'm not arguing the design attribution. I'm arguing your citing Cornish & Whitten as a definitive source for what you claim. if you check the specific references in that edition under, respectively, Colt, Alison, CC Detroit, Milwaukee CC and Orchard Lake, they do not substantiate your claim or that disclaimer for the design credit of Alison acting alone.. There are lots of mistakes, inconsistencies, omissions and contradictions in that book, however valuable it is (and it is) as a starting point and as a guide book. That's all I'm arguing here.