Can't say all of this is very encouraging being as I jumped at the opportunity to try the ceramics. Couldn't resist at the price of them. On the other hand experience is king and I do have another engine for parts. Really hope theywork out though, I was kinda planning on re-building that spare engine. Just to show you what I was dealing with when I decided to try the ceramics I will show you what I found when I pulled mine down. This engine came from a friend of mine and I do not know the history of it but it did run(believe it or not it ran pretty good) Maybe you can tell me what this mess came from. Retainer in the rear bearing was gone and both were rough.