I also printed the Omega case by ElmoC. It is a great case, although there doesn't seem to be consideration for the MicroSD card. A small amount of fettling was required to make it all fit. I removed the small pillar between the microUSB and fullUSB ports and all is great.
In order to hold the 2 halves together, I clamped them together and then painted the side clips with acetone. Once dried it all stays together really well, If I want to remove the Omega2 from the case then it is easy enough to break the tabs off and then reprint. I am using mine for OctoPrint, I intend adding a camera from a laptop.
I will post a picture of my case later today.