Looks like this might be a better power supply to get me on the high end of the output torque the servos are capable of.
OMNIHIL Replacement AC / DC Adapter Charger Cord 6V 2A (2000mA) 5.5mm x 2.1mm Regula... https://www.amazon.com/dp/B00LU8Z9JI/ref=cm_sw_r_sms_c_api_Lr2WAb8CXGRR4