I just bought a 1952 Sheldon 11" by 36". I have not yet checked the steady, but did have occasion to use the follow a couple days ago.
Getting it out, it looked like it should fit the bolt holes in the right side of the carriage and did, once I has chased 64 years of hardened
dirt out of the boltholes with a tap and air hose, and had purchased some grade 8 bolts since they were missing. I found that the rear
screw could not be backed out for maximum diameter without hitting the crossfeed carriage. I had to beat the jaws loose with a hammer,
as they were frozen into place by a fit so tight it couldn't even rust!
But the biggest surprise was that the jaws did not contact the workpiece on the center of the jaw. I am inclined to think this follower
belongs on a 10", Perhaps someone has a 10" and your follower has a similar miss-match and we could trade?