I've been dealing with Ed for the past week or so on some "special" cards. It's been FUN, and dealing with Ed is always a pleasure.
Actually I really like Ed's new approach. Dupes can get boring. The idea of getting as many singles as possible is a GREAT idea.
For those who were wondering: A complete set of 520 won't be possible. Ed didn't collect any PBs (killing Demmitt and O'Hara, which could be a blessing

). Also Ed's collection was almost all Hindu, Piedmont and OM. The Piedmonts were almost ALL 150 or 350. There are only a minute number of 350/460, so that series will have many holes.
As an aside: The grand majority of OMs were OMSLs. Relatively very few non-OMSLs. My theory being that Ed lived in Florida, and OM distributed more SLs for that region.
Fun, fun, Scott
Edit to add: Like the OMs, of the 66 Hindus, ONLY 3 were non-SLs. So same idea that Hindu distributed more SLs in the Southern region.