Lew I looked at the steady rest video and I liked the idea. I also designed mine for my mini lathe and can also insert my steady rest without removing my tailstock.  I have two sizes of rollers on reversible arms. The white rollers are from shower stall windows and the black are for printers and have bearings. Both work well.

The white tape measure is glued to my desk board. Free from a furniture store.

Pretty neat set up.  

I really like the two different sets of wheels. 

 

On my round steady, I mounted one of the arms on the opposite side of the frame. That permitted the distance between the wheels to be less and therefore turn smaller diameter objects but it does make two wheel tracks around the turning.