This card should remain as is, in my opinion. I'm not against restoration, but adding 45% of something else to this card would simply be bizarre.
As with a paper currency, it has to be over 50% there to count as "a card." It's logically impossible to have 2 or 3 "one card." Then you're dealing in parts of cards. I assume if it's less than 50 percent, PSA wouldn't grade it as a card anyway.
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