I realize it's been a while since you posted but have you ever sought out or looked at any tutorials Jasem has placed on the Internet. He covers How to find the suggested FOV settings and how to use/copy them to the necessary window for Astrometry to use it correctly saving time on the process. I found 3 separate videos covering Astrometry alignment using Ekos. If you follow the tutorials within you should not have an issue. I was having similar problems I just wasn't using a guide camera I used the main ccd.
If I had the means to I'd be installing a fan on my StellarMate as hot as it gets it really should have one built in from the factory. I installed a fan on my raspberry pi and was able to cool the pi to -30 degrees ambient. If that is some of what you are talking about?
I have to say the 2016 article was brilliant and an absolutely accurate guide in building your own observatory computerand when I made my attempt to duplicate your article all I had issue with was installing Astrometry but after reading the how-to I was able to install both the local and remote services. My build works just like the StellarMate I own. Literally everything works perfectly on both of my mounts. It's like having your cake and eating it too.
If a person has a laptop that isn't doing anything and you have an itch to build this is a worth while project that will give its user hours of fun and satisfaction.
That's what I was going to suggest too but make sure you select LOCAL or it won't find the server and astrometry will mot work.
I am the proud owner of an Atik Infinity Color. It's an amazing ccd that captures very nice video and you can use to make very nice images too. "In Windows." Unfortunately I haven't found a way to accomplish it using Linux. I don't think Atik hasn't created anything for us to use in Linux that I know of.
CAN SOMEONE PLEASE HELP!?
I have established full wireless control of my entire observatory using KStars/Ekos all installed on a new StellarMate with all the most recent updates. I even down it all over the wire too straight from a Linux laptop with KStars/EKOS all of INDI, Remote Astrometry with all of Jasem's suggestions to get my model up and running.
I have created a profile using my Atik Infinity and a sim mount and there doesn't seem to be any controls for video anything. Not even running things straight off of the KStars Device Manager.
So we're submitting a forum to find out just how to do it.