It takes a lot of balls to soak a $6600 card, but I guess it paid off in end.
Still a NM (7) and you can still see the remnants of the tape stains IS a little concerning.
Wonder if that would be a (7) on any modern card with similar evidence of past taping on it.
Looking at the REA auction, it was probably cleaned up just to get the (4). Now another round of cleaning got it to a (7).