What type of fastener do I use? I have a Firepower 400 from HURC. It has the metal cross gizmo that connects the motor to the wood motor box on my EVA sport. I'm not sure if I use wood screws or something like 4/40 nuts and bolts to attach it to the motor mount. The motor came with screws to attach the metal cross to the back of the motor and to connect the prop adapter to the front of the motor. Nothing to connect the motor to the motor mount.