I consider myself somewhat (very) attached to the Elfi design. I have 2, both are rudder versions and my only upgrade thus far has been the high performance m100? motor upgrade from Nesail. I've had 3 or 4 major crashes with the damage in the form of dented leading edge and the boom broken at the motor mount. The tail has also broken off. The nosegear has changed shapes many times and is now a paper clip bent in the proper shape. Other than that, it has proven very durable and my dog wears herself out chasing it.