Seems like a great idea to me!

One thing to keep in mind is that not all CORS are full constellation enabled. Therefore, the solution (and position) could vary depending on local conditions when using GPS only versus GNSS. As always, it pays to know as much as you can about the area (and CORS) where you work.

So true. I often will pull data from CORS that surround my work site area and do some checking especially in areas where I have not worked. I have found a couple that I will not use for OPUS when I need a better vertical. One in my area has still not been updated by the owner for correct antenna. So NGS doesn’t have the info either. I will be passing by it next week so I will take a peek once again to see what is actually on the mount.