Agreed. Ethanol is a funny fuel. It takes quite a bit more then normal to make it detonate even in unfavorable conditions compared to other "race fuels". It appears to me that the tune had way too much timing in it and caused the rod to snap due to extreme cyclinder pressure. Just because your able to add more timing without detonation when using Ethanol doesn't mean it's safe whatsoever. The fact that it completely failed during cruisnig really means nothing. The damage was definitely made during WOT and just happened to completely fail during cruise after substantial damage was made.