I hope these gentlemen in S. Africa put the engines through the paces to see how they hold up. I?d like to see a few of them put in flight school aircraft and see how they handle the abuse. It was interesting to see they chose to do upgrades to the stock models. I like that they are sharing their experience with the public via YouTube. Like I said before only time and many hours will tell whether these engines prove to be the ?Rotax Killer.?