Thanks, guys.
I think that occupying only the last positions in the books, Ms. Tree #50 and Airboy #50 (and Sandman Midnight Theatre, which falls at the end of Sandman Mystery Theatre vol.2 as I have it mapped), the cardstock covers would cause minimum disruption to reading, other than maybe those issues themselves.

Ah, the meek. Playing the long game.
Sneaky bastards.

--Denise Mina, Field of Blood