WIth respect to my cream legbar hatching eggs, yes I candled at 7, 14, & day 18. Originally, I had 8 eggs but one stopped developing by the day 7 candling. The eggtopsey indicated a bloody ring so this was a good call.
Regarding my incubators, I had originally used the BYC incubator picture page to identify some ideas for an incubator. I did build a styrofaom cooler incubator and ran it enough to stabilize but I was not happy with the size (I will use this one as a hatcher). So while trying to find a larger cooler to use to build another, it became apparent that the investment would amount to an already constructed model. So I purchased a Farm Innovators 4200 with a fan & accessories. I am happy to say that I did not trust the installed thermonmeter & hygrometer. I used a digital indoor device and a wireless sensor to measure temperature and humidity. Both had a good correlation so I felt comfortable.
In addition to the cream legbars in lock down, I have:
15 Swedish flower hen eggs, 8 blue wheaten ameraucana eggs, and 9 EO (marraduna basques) eggs in the incubator at day 12.
Holy cow, when you said you getting back in to chickens, you meant you were diving into the deep end! That's 32 plus 7 (if everyone hatches), that makes for a lot of chicken fluff!
Swedish Flower Hens are on my eye-candy bucket list and I almost was going to order some of them along with the Cream Legbar eggs but the voice of sanity chimed in (that would be my DH) and said to concentrate on the one I've been Jonesing for all these years (see I do listen to him now and again

You'll have to post pictures when they hatch! Sounds like you did shipped eggs? How far did they travel, any problems there? I had horrible luck with shipped eggs with my home made incubator, so I am switching over to mother nature and letting a broody do her thing for the next hatch to eliminate that as a variable.
Good Luck!