After I saw connectors at the receiver coming lose, I did not just push them back in. I cut two bamboo sticks, about 1/8-inch diameter and about 1-1/2 inch long and laid them over the connectors on the receiver. I then used electrical tape to fix them in place. The connectors cannot back off. Period. On all extension connectors or the connectors to the ON/OFF switch, I use a strong thin string and tie them together. They cannot pull apart. Period. Learn to use the "belt and suspenders" approach on the models. It takes little effort and practically no cost. My concern is not losing a plane; it is losing control of a plane and hurting someone or something.