SC560F30 has 52 cards in it. All of them are found in the 109 F42OP subset.
Left over are 57 F30 cards that were overprinted but never released into the wild as F30 cards. This breaks down into two 28 print groups with one card being swapped out at a second printing (Ames with Dougherty) giving you 57 cards.
These two 28 base groups are used multiple times throughout the 460 series for different backs in combination with the SP and your Exclusive 12.
One of those groups of 28, not coincidentally is made up of ALL the known yellow brown scraps + the 6 SuperPrints.
NONE of the other 28+Dougherty cards have been found in a scrap form. This leads me to believe that the scraps that are found are linked, likely on one sheet.
