Good gawd!
4th will be the charm, I'm going to lay down Masin's law on you now - " you're not allowed to blow anymore engines!"
This one must be exceedingly frustrating because of the fact that its not dead - just weak and you know it. If the thing idled on one rotor you'd likely be much happy about pulling it apart!
Keep it up B - the car will find its chee.
"and on the fourth day he made another rebuild. And he said it would be good. And it was good."