Do You have any pics or videos of Your choppers in action.
I'm glad no one was hurt when that main blade blew apart it must have bin scary & expensive at the same time.[X(]
I'm glad You have experience with Heli setup, some times it's hard to tell how much R/C experience new Spadders have, so I tend to give as much safety advice as I can, which can also help others reading the post that may not have that knowledge.
I admire people with the skill to fly R/C copters, one day I hope to be able to try My hand with a Heli.
I can set up, hover & do 3D stunts with a few of My Spads unfortunately at this point they are all I can afford .
I have no trouble flying 3D Heli on a flight sim but I know that's worlds away from the real thing.
I do use a lot of Heli engines on My Spads though
the carbs are much more superior to the airplane versions of the same engine.
Jeff