Hello, I used to have a domino but sold it and purchased a new one 3 months ago but just used it today. All my board were lining up in a way that one board began high on one end and low on the other. I critiqued my form and did about 50 plunges in plywood (suspended not resting tool on tabletop) I cut in half to make sure the joining pieces were identical in dimension. Today I measured the distance from fence to bottom of the tool. I found a difference (fence is not level. I attached an image with a square piece of plywood to illustrate the difference. you can see in the image the right side is flush but the left side has a significant amount of the bottom of face still visible.