I'm using Evoluion .45 from Hangar 9's Mustang PTS MKII, well, it's factory pre-broken in from factory. It's flying great. Evolution is chinese, Magnum is chinese, ASP is chinese, but these engines are running great. I just started today breaking in my Magnum .46 XLS, that engine can scream. I don't know there should be a way, I would hate it to be trashed.