You have options for the hatchlings, you can leave them in the inc till first shed, you can put them all in a tub together till their first shed and then separate or you can separate right away and give them their own lil damp tub to have their first shed in, your choice, no option is wrong.
I personally separate them into their own 6qt tubs with damp paper towels as they crawl out of the egg.
We have been cutting on day 55 unless one pips before that, that again is a personal choice, some don't cut at all and others do it on day 52 etc.