I just want to point out that the indoor Maz/Chest saber is initially found and touched by Rey, yes, but then it is eventually shown and then handed to Finn while indoors, and Finn actually handles this Maz/Chest saber for much longer than Rey. So in my head, I can't call label this saber as Rey's saber only.
Likewise, there's no reason to think that the lightsaber which smacks into Rey's hand in the dark woods when she force-pulls it, and before it is ignited (at which point stunt sabers took over for much of the fight), was not the grips-to-end version already used in other outdoor scenes and specifically already being used in that dark woods snowy location. This grips-to-end version is the saber that she doesn't just touch briefly, and then reject, but finally embraces, while the "Binary Suns" Force Theme swells. So listing this saber as Finn's only. Again, can't make that work in my head when she's holding it for an extended time during a pivotal scene, and this contact last much longer than the brief touch on the chest saber.
To me, the indoor hero is seen/handled by both Finn and Rey, as with the outdoor one, so it's just not as simple as labeling each by one person's name.
Btw, the final saber used on the Isle of Skye when Rey extends her hand towards Luke...you have to still frame it to catch which version it is, but to my eye based on going frame by frame...grips-to-end all the way, further supporting that this saber can also be considered "Rey's saber" just as much as Finn's. In the end, though, we may discover that a third hero exists.
I'm torn. I want the saber she's holding while standing in the snow when the Force theme swells and which she extends towards Luke. But I also don't want to alter the glass eye, and I'd really like to make a nice chest display for it. Decisions, decisions...