LRT is designed to work with multiple manufacturers’ portable motors. The LRT comes with three optional motor choices.  Two Altair Models and one CP440.  Each model has its unique benefits.  The Altair Motor has an exceptionally short between eyelet-to-hanger bar distance. Be mindful of minimal lifting and transfer surface heights for the motor you choose.  CCP Motor has an exceptional warranty and the hanger bar is positioned beneath the motor.  Regardless of the motor chosen, the lifting capacity does not change for the arm length chosen. Do not exceed the LRT’s combined transfer weight capacity of 300lbs. or 440lbs for any transfers. You will find a phone number to contact the manufacture for any service and warranty questions and support motor requirements.