I replied to an earlier thread on a steady rest (which I couldn't find)
about there being different hardnesses of wheels. Our club had a demo
last week with a Sudal type of tool and a steady rest. The demonstrater
(Dean Jordan) has a wheel on each end of each arm; one softer, and one
harder, and the arms can be rotated. there are hardness ratings between
50 and 100 (I think). With bigger hollow forms, the softer wheels can
allow more vibration.
robo hippy