Since I'm still in the early stages of planning and can't make a proper thumbnail, I'll start with the already completed RG Gundam Astraea F.
This is not unrelated, as starting to build this was what prompted me to start planning it in the first place.
Recently, I've built three RG Astraeas: the RG Gundam Astraea and the RG Gundam Astraea type-F&F2, which are available at Premium Bandai. At the time, I realized that I now have a total of three Proto GN Launchers, so I realized I could wield two Proto GN Launchers.
I was able to wield two Proto GN Launchers without any problems, and all I had to do was fine-tune the arms and angle...
The Advanced MS Jaws at the base of the arms...

RG Gundam Astraea type-F Avalanche Project (preparation stage) | TOKO(ロボットアクマヤクザ)'s Gunpla works