its a corti incubator, like mine! is it the "50" Terry?
we take them out when they are drying - they go right next to the incy in the brooder, so can still be heard... we found that sometimes the newly hatched chicks roll the other eggs around and make it harder for the other chicks to get out. the heat lamp goes on when they chipping starts, so it is warmed up, and they start off in a small cage and progress to a bigger one!