Originally Posted by Joseph Frost

Easy to do, get from your hobby shop some light fiber cloth and lay it over the belly with slow cure epoxy or even water base resin will do. I suggest fit under each wing little ply fin/skid to protect your linkages and avoid possibility of wing tip digging into the ground on landing. I have done hundreds of flights with similar size 64mm "F-16" model by Kyosho back in the old days of brushed motors, bungee launching them , much safer than hand launch, unless you really know what you are doing.