First time using Ez-LOKs. Couple things I learned. The thread locker compound is ****. It made it so hard to thread the lok that I stripped the notches. Once I removed it and added fresh red thread locker it went in easy. Flushed it to the head and it barely looks repaired. Now to clean up, gasket, and button it up. I gotta say these ez-loks seem way more solid than Helicoils.