I find DWO alignment to be overly time consuming and sometimes frustrating. I had been thinking about how to speed up the process with a 3d printed tool until Bonesey mentioned something I hadn't considered. Because there are 31 dates on the wheel, they are not spaced such that you can make four windows at 3,6,9, and 12. So I worked it out using a little trig. I made this prototype "dial" that should aid in the centering process... Here it is overlayed on a genuine 3035 date wheel: I