Thanks MikeFWIW: I've been fooling around with this follower rest concept drawing for a few years.
It's based on measurements taken from my 1941 round dial, a pair of 10EE steady rest jaws and scaling & sketching several internet photos of the square dial follower rest.
Understand that I have never seen an actual 10EE follower rest and the concept would require alterations to suit a square dial machine and to allow clearance for DRO scale mounting.
I will share the .dwg file and my photos with Gary Martin, if that will move the project along.
Sorry, but the .jpg attachment is not crisp and clear.
View attachment 385034
I'm not sure what has been decided, I need to go back and re read this thread. What Gary Martin will need is a sample part in hand and a drawing of that part. If your design was used a part (model) may be needed.
It is possible that the dimensions in your drawing would be what is needed. I don't really know, I have been out of the commission.
In the end he will need someone's follow rest loaned to him to work with. I know he has to build a box. I could give him a call but someone else here may be more qualified.