Bipe, the motor in my sullivan burnt out real quick, too. As you noted in the old thread, it's a standard size 540 motor, so I stuck a new one in there from a failed electric airplane attempt from the age before lipos. Seems like the new motor was from a kyosho glider or something similar. Anyway, the better quality motor has lasted several years without a burp. I think the desire for more profit got in the way of a superior product. It's got more torque and RPM now, which makes it useful up to a .15. (doesn't the package claim that? It sure didn't deliver before.)