Hey Ernie ! Ive been a auto tech for over 20 yrs and torn down countess engines ! and I have never seen a rotating ring yet !! when assembling a ring set on a gas engine piston your to always stager the ring gaps so they are not inline ! if they are able to rotate there would certainly not be any good reason for stagering the gaps! you can see this prof of the rings not rotating by the ring marks in a cyl. just my $.02