Great set!
Your're short a Holmes [An Exhibit Card]:
Also this Lombardi MADE IN USA variation:
Rizzo is the toughest card. Mulcahy is probably the 2nd toughest card in the set. I ended up needing Mulcahy as my last card, but got Rizzo on a fluke in a mixed lot of cards on eBay from a seller who did not know the set. Gehrig isn't so much hard to find as it is expensive when you do find it. Klein, Hartnett, Lombardi [waist up], all quite tough to locate. I also had a hard time getting fired up to collect some of nit-picky variations, the lower left/lower right legend location, or the MADE IN USA/Made In USA/Printed in USA, or the "An Exhibit Card" aspect. Since some of the cards were printed into the 1960s [like Williams No #9], you can pick up shade and legend variations throughout.