Any idiot can break something. A perfect block can be destroyed in seconds in the wrong hands.

There is not an engine builder I know who has a 100% success-rate. You get to become a reputable builder by tearing shit up and then doing it better the next time. That's why manufacturers/builders love for people to send hurt products back to them (it's not bc they want to play hardball with you) so they can get data and revamp their products/process if needed.

I have never had a JGE block warp - or a JGE sleeve fail - but there are many examples of those who have. For every manufacturer you praise I can find examples of where they have fucked up.

Make sure you do your homework, research, and then pick a tuner who knows what he is doing. After that KEEP UP WITH THE MAINTENANCE and project should last a long time.