Hi @Aashley,
@Petter007’s frame was similar enough to the original BlueROV one that they may have just selected it from the built in options.
This thread covers the main links for how to go about building an ArduSub version with a custom frame.
If you want the frame to have a specific name and/or image in QGroundControl then this thread covers the main steps required, which is more in line with what this post was about.
Since this never got clarified, this isn’t quite correct - there’s some more detailed information about the differences between BlueOS and ArduSub (and an overview of our typical software stack options) in this comment, which I haven’t yet had a chance to add to our documentation.
This is now available, in recent BlueOS 1.3.0 beta releases, and will be included in the next stable release (which should be in a couple of weeks)