As for Promethion's visuals, my contribution would focus on the shoulders, and how the beam stars are stored.

Being mounted on the shoulders, they could either be splayed out, or folded, very vaguely resembling the bottom image's right and left shoulders, respectively:

[img]https://3.bp.blogspot.com/-V7RJrt325NA/WKE07F-3vmI/AAAAAAAGj2A/Rq0G0XgCRs406a-Ha8UY1CcrrWCqDDS0wCLcB/s1600/mg-nix-providence-gundam%2B%25282%2529.jpg[/img]

In folded configuration, it could drape downward, like a shoulder cape:

[img]https://3.bp.blogspot.com/-gDO0QbxKNrs/WQ1XD86NFDI/AAAAAAAGpEk/6TcldXgkI6smuzRtJHfi8zGbhJga7VRgQCLcB/s1600/neo-rose-gundam-custom-build%2B%25281%2529.jpg[/img]

or like this:

[img]https://vignette1.wikia.nocookie.net/gundam/images/4/43/Age-2-ms.png/revision/latest?cb=20120502013514[/img]

Or point forward as a dual shoulder beam cannon:

[img]https://vignette4.wikia.nocookie.net/gundam/images/6/61/Age-2-artimes.png/revision/latest?cb=20120527061012[/img]