Dylangrace..get yourself 3 books..
1---The Authoritative Reference on
Eisenhower dollars..2nd Edition 1998..J. Wexler, B. Crawford, K. Flynn..
You'll see DDO-OO8-DDO-O28 for Peg Legs, and, DDO-O29-DDO58 for NON Peg Legs(or, "Serif R0, and, all the asst.
DDR.s...outdated, but, still a great reference until Tom K can finish his monumental book in the works.
2---Collectible IKE Varieties Facts, Photo's and Theories.2011, LULU PRESS..simply awesome, by the IKEGROUP.info gang..you need to learn their "Bookend" doubling terminology, or, "spread"(notching), within a "Family". Awesome chapters on Peg Legs too.
3---Coneca Attribution Guide to
Eisenhower dollar Die Varieties, by James Wiles Ph.D., 1997..very hard to find, but, worth every penny for understanding Series Doubling, Master Die Doubled Dies, Working Hub Doubled Dies, and Doubled Dies..go to enough coin shops and coin shows, and, you'll find those 7 IKES you listed in a jiffy..just remember, a LOT of what you see in the IKE series is doubling with no premiums, as it is either MDD, or SD, or, a combo of both. HINT..stick with the BEST early die state coins you can find..they are the best bookend coins you'll find. Happy Hunting!
CG