Warning: You must check carefully whether the mounting screws are touching the windings (copper wire) inside the motor or not. The mounting screws should not touch the windings otherwise the motor will get overheat and burn the motor and ESC eventually. The screws shipped (AS IS) with the motor could be too long or too short for you depends on the thickness of the panel where you mount the motor so it is out of our control and it is totally your responsible to check before using it. No replacement or refund will be offered for this negligence by customer. Thank you for your kind attention.