I cut my first clutch on day 52.... I know.... But I was kicking myself for it because I wanted to wait to see them pip on their own but peer pressure's a B word... And I am a little impatient and they are doing well so far. For the clutch that is emerging now I waited until the first 4 pipped on their own (day 55) and then cut small windows in the others. This is my plan from here on out! So I guess I am a cutter even though I have only had 2 clutches ever so far...