well this was one of two aluminum cover aircraft entered in TOPGUN 2011. this one was covered over a conventional fiberglass/wood frame. futaba system.
the over was a full aluminum miniature of the SONEX full scale aircraft.
you are more likely to have problems with the ignition systems than the airframe.
do you range checks.. on the BT.. we installed it and drove the transmitter till we couldn't see the airplane anymore on the ground. And still had contact.