The reason for engine failure is 99% usually handling errors. In this case, I broke the threaded valve housing wall of the valve house on the original cylinder because I pulled nut awry by misstake when i wanted to tighten it up harder to eleminate a minor air leak. And the reason for reduce leak was to beat Ronnies DL exceptional low idle run.Because of this misstake and broke of the origin cylinder I replaced it with a used cylinder what later exploded by a hidden crack that I missed when i bought it.
After the cylinder explosion i repaird the first original cylinder what still runs. I did cut out a piece of the exploded cylinder and velded it to the origin one as shown in the picture.
