Thanks folks! Some of these DDOs are tough to find on circulated coins, and it's really darned expensive to go around buying B/U rolls of things like 1942-D hoping to find them. I've been poking around trying to get my hands on lower grade uncirculated coins that are cheaper but where the DDOs can still be seen. It's sorta working, and adding a bunch of RPMs that I otherwise would not be looking for on circulated coins as well.