So I took apart my trusty 20 and put in a new stock ring. Piston was in great shape with just a few minor scratches near the bottom. Got a new cowling for the Rev 70 and put a Pitts muffler on as well. I also did the sanding mods on the intake surfaces. Bearings were all in great shape and very smooth. Question I have is about breaking in this new ring. What are your recommendations on that? Taking it out tomorrow to fly. Temps should be in the high 50's. I've left my needles where they were prior to the "rebuild".