I think you are about to get a series of people saying "why cut!? They will come out when they are ready!" I would like to ask why you are incubating at 92F? that seems a little on the hot side to me. At those temps you would probably get them pipping on their own within the early 50s day range. If you reaaaalllly need to cut I wouldn't do it before day 55 at those temperatures. My eggs didn't pip on their own until day 67 this year, and they were incubated at 88-89. I did cut one egg on day 64 because I was getting nervous. From my limited experience, I would say it is hard to really know when to cut. For the most part, if there is not a problem with the snake, it will pip when it is ready, but if you just can't help it, it is safe to cut at day 55 at those temps.