@Maine, I'm glad to help.
My father told me all my years growing up that if I listened to him on certain topics - mistakes he had made - that I wouldn't need to repeat them. That said, I know an old timer that has grown literally every hickory there is. I kept extensive notes from telephone calls with him. His name is Fred Blankenship (and) he builds those Mr. Hickory crackers. He doesn't have an email address and doesn't have a smart phone. The only way to get one of those crackers is to call him. He builds them one at a time in either John Deere green or IH Case red. These are my notes from our phone calls:
Fred Blankenship said if he could redo his orchard today (2015 phone conversation) he would grow Gary Fernald's unknown hican from Howard McDaniel; 'Grimo-5' shagbark; and shagbark 'Grainger'. Fred stated that 'Grainger' had hardly any (parts of the inside shell that hold the nut in place) so it is a very easy to get the nut meat out, selection. It's also the size of a shellbark nut.
Fred's shellbark picks are: Fayette, Selbher, Henning; Fred also likes Simpson #1 and Scoll. Scoll likes pecans, said Fred (pollination I assume.) Fred stated additionally that shellbark 'Bullnut' is a favorite of one of his friends. Fred's 'Fayette' is different from scionwood that came from Larry Daulton. Larry Daulton's Fayette is preferred. Tyler Halvin has wood distributed from Larry.
Gary Fernald has hican 'Burton' which he got his scionwood from Clifford Dabb's who got it from Roscoe Pringle. At the time of visit with Clifford Dabb's, Clifford suggested to Gary that he had several 'different' 'Burton hicans.
("Keystone" from Grimo Nut Nursery we call "Grimo-5" to differentiate it from the true 'Keystone')
As you see I'm really into nut trees. My good friend Gary Fernald has this "other" "Burton" that I simply call 'Gary's hican. It's a highly impressive nut. We've actually all decided it's a full shagbark. Those no resemblence of hican to it. However, the true 'Burton' which Gary thought he was grafting is a hican. So the name: "Gary's Hican" started off as that name and I passed scions along with it being attached as a hican.
You can count on my notes as the word of God - if you know what I'm saying. In another email I wrote this regarding 'Grainger' shagbark: Grainger’ shagbark. Fred said there’s almost no ribs and it’s as large as a shellbark and you get big halves of kernels.
Always glad to help when I can.