this thread showed some nice candling pics using the NR 360 candler. They put a dark piece of paper with a smaller hole to candle and focus the light into the egg.
https://www.backyardchickens.com/threads/are-these-embryos-dead.1231519/
@Nurtureright360 Turned out the cord was included. My mistake. Thank you!
So far my incubator is working well. I am hatching shipped eggs so not using the turner. Checked at 8 days and out of 15 eggs, 2 had blood rings but the rest showed veining.
I just picked one up to use as a backup. My other is making noises when the fan runs. Think I am missing a power cord. No way to plug into electric socket. Does it have a regular plug?