It's been a while since my last post, but I did knock off a couple of the difficult cards. I picked up #90 Hank Edwards from another Net54 member, and #146 Granville Hamner got back from SGC a while ago. The other two, #75 Mike Garcia and #178 Jim Waugh were eBay finds that I was able to get pretty good prices on. In the year+ I've spent building the set, this was the first Edwards I've seen, and only the second Hamner. As a side note, Hamner's nickname during his career was 'Granny'. He must have been heckled something awful.
I have two more that are in the mail, a purchase and an auction win. They should be here within the next few days, though it may be a while before I can get home and scan them. These four bring me up to 143/274 (52.19 %).