I'll add my $.02
There's no way I'd ever even consider breaking a card that's graded GEM with all 9.5 subs, ever. The fact that it got a 9 auto grade doesn't really matter, a lot of them do, especially on sticker autos.
Add to the fact that the BGS holder is going to protect that card multitudes better than a one touch magnetic, and I'd put it in a graded card bag, and leave it alone.
Myself, I don't use anything but toploaders, even for high end. Magnetics, screwdowns, etc. give you a false sense of security. Cards can move around in them way to easily, even in the proper size, which can and will lead to damaged edges.
Think about it, BGS seals cards in what's basically a penny sleeve, why? So the card doesn't move within the slab. Same idea with a toploader. Penny sleeve so card doesn't move, and sealed in a team bag, done.
There's no way I'd ever even consider breaking a card that's graded GEM with all 9.5 subs, ever. The fact that it got a 9 auto grade doesn't really matter, a lot of them do, especially on sticker autos.
Add to the fact that the BGS holder is going to protect that card multitudes better than a one touch magnetic, and I'd put it in a graded card bag, and leave it alone.
Myself, I don't use anything but toploaders, even for high end. Magnetics, screwdowns, etc. give you a false sense of security. Cards can move around in them way to easily, even in the proper size, which can and will lead to damaged edges.
Think about it, BGS seals cards in what's basically a penny sleeve, why? So the card doesn't move within the slab. Same idea with a toploader. Penny sleeve so card doesn't move, and sealed in a team bag, done.