The last scope I mounted in Leupold dual dovetail rings I went cheap on the alignment tool.
I found a 3/8" drive deep Craftsman socket in my tool box that measured almost exactly 1". The problem was I only had one. My next door neighbor just happened to have another one that was the same.
With the two 1" od sockets and a straight edge it was easy as could be to be align the rings and mount the scope.
