My limited experience with cutting vs. allowing them pip on their own. I incubate at 90 F usually the pip around day 54 - 55
I keep my hatchlings in 6qt tubs with paper towels a very small hide and a water bowl. 4" heat tape belly heat with a surface temp in the tub over the heat around 88 F. I dont even attempt to feed until the day after they have all shed.
My last clutch piped on their own when I was working out of town. This particular clutch had 4 eggs. One of the four started on live rat pups 2 days after first shed (their first offering) the other 3 refused. I waited 5 days tried again the same one ate again and 1 other took a rat pup the remaining 2 refused so I gave them a hopper mouse and they both took it. Now its several weeks later the 2 that have taken rat pups continue to do so every 5 days the other two still want mice but will take mice readily. I even make them wait an extra day or two before offering a mouse in hopes they will take a rat because I breed rats not mice but no luck yet.
I have had several other clutches some of which I cut some I didn’t. I have had to do the same thing with mice for some but I have always gotten them to switch to rats eventually. I haven't noticed a difference between the one's I cut and the one's that piped on their own.