Good morning, I purchased a disassembled 500i that I picked up for a good price with the understanding that it needed a top end. My experience level only includes one top end on an 036 that had obvious P&C damage, which I replaced both, reassembled, and the saw still runs great. This saw does not have obvious damage to me, but I may not have the level of experience to see the problem. Piston rings move freely and I don’t see any scratches on the piston. Cylinder has some vertical shiny lines but no transfer or anything that I can feel. Any thoughts from those that have the experience would be appreciated.