Good question and I would agree with posted response, I would like to point out that the question posed as a drawback to square rule is off base. The draw back is not the layout method. The draw back is the irregular timber. Square rule is a method for accurate and consistent lay out and joining of irregular sized and shaped timbers with predictable results. In this way it performs quite well. The concerns raised are aesthetics regarding mostly whether timbers meet as flush surfaces and such. These do not affect the ability of square rule to function as a layout system.