Soilarch,
Ribteks tend to have smallish ferrules, they will fit on 11/32" but not great, a lot of Ribbie shooters prefer them on 5/16" adapters.
I believe the "Wides" are 1 1/4".
The steel on the Ribtek was similar to a Woodsman, 45 HRC but they are different. The blade edge is actually highly compressed, which makes the cutting edge harder. They sharpen well.
The original operation was recently sold to a large archery shop in Australia. Heads have been harder to get since then. I'm not sure if they are still making them, or just bought out all the current inventory.
leewillis, I'd not heard about that. Are you talking about the new owner or the original? I forget his name...Colonel somebody I think.