Daidalos

Hi would like to check i just got myself a extended controller. Am using it to build a gimbal mounted with a custom high pressure washer. Due to the weird geometry and weight of the nozzle, it is hard to align the axis with the center of gravity and the motor is not strong enough. is it possible to just add another motor in parallel? I see the manual has details on adding a 4th motor but it seems to be for other purpose. anyone can advise me would be appreciated