Yes, rubber bands(2) were used to hold the wings on . There is very little force trying to pull the wings out. I normally prefer to use a large "O" ring to hold my wings on. They can be found in many large hardware stores in the pluming dept. I f you can determine where the previous owner had mounted the receiver, battery and servos and also the fuel tank and you mount your equipment in the the same locations, the CG should be correct

John W.