I know, and I won't take it as a bash. I asked for input. I'm trying not to conflict with concrete, cannon events, but merely to add on a side story. I might eventually change the name of the Graystar. Though, I don't know if any history is given for the other OYW Pegasus Class ships.

Was Mudrock considered part of G4? I was doing research, and it was developed at Jaburo, and has weapons mounted in its forearms. In Zeonic front, (which I have, and have beaten), the Mudrock and Blanc rival are damaged at Jaburo. What if the Blanc Rival had another G4 Gundam which was effectively destroyed by the Midnight Fenrir's attack? The G4 arms could have been salvaged from that.
Here's a bit I borrowed from Mark Simmon's timeline:
23:00 Four warships, including the White Base, launch from Jaburo to divert the Principality forces. Each ship takes a different course. (Local time is 19:00.)
(Mobile Suit Gundam episode 31)
* Source: Master Grade MS-09R Rick Dom manual. The local time is specified in the episode's dialogue. Although there's no information as to the identity of the other ships, they could perhaps be other vessels of the Pegasus class. See footnote 11: Departure From Jaburo.
The Graystar could be a part of this...unless you have documentation of which ships actually launched...
(This part is purely speculation.)
