I have kept coneheads for years now and successfully hatched eggs from them as well. I have raised quite a few from hatchling size to adult as well.
I incubate the eggs at about 80F (I say "about" because the method I use to incubate them leaves them somewhat open to the room temperature fluctuations, so it goes up and down a few degrees as the room temperature does. I use delicups which I have half filled (2" deep) with moist vermiculite to incubate the eggs in. The vermiculite, when you take a fistfull and squeeze, will only have a drop or two of water come out. I lay each egg in a small depression on the surface of the vermiculite. I punch a couple of very small holes in the lid and place it back on the container. I had 100% hatchrate doing it this way. I check the eggs about once a week and if they are denting in add a little water around the edges of the container...but I don't usually have to do this.
The females can lay 4 or 5 clutches of eggs in the season...so you may get another clutch.
I will be glad to give you hatchling care when you get to that point.
You said..."They were together until about a month ago when I seperated them as one will not feed on its own. This one we hand feed, it eats well from hand but refuses to eat on its own"...I'm glad to hear that you separated them under the circumstances. Do you know if its a male or female? Can you give me any other information about it?
I'll try to post some good care/husbandry sites later. I don't have time to look them up right now.