I take the turners out and use cartons/card board trays and hand turning by tilting the carton and sticking a small spreadable cream cheese container under alternating ends, if I feel I have to. I do it about 5 days before the hatch. I had some Japanese bantams or Seramas surprise me on day 18 last month. Luckily, I'd already put them in the hatching incubator with a group of eggs that were a day ahead of them.