He forgot the locktight but its all good now. It blowing out was partially my fault or mostly depending on how you look at it. I somehow managed to crossthread the plug about half way down and it just got worse from there. To be honest I kind of like the thought of a timesert. Don't get me wrong, I hate to have spent that much money, but now I don't have a steel(or whatever type of metal a spark plug is made of) spark plug running into an aluminum head. Instead, it is hard spark plug against hard timesert.