what power supply do you recommend for OSR2+ (+twist and valve). Equipped with 6V, 35 kg servos (SPT-5535LV). the current power supply is 6V 8A, but I feel it is not good because it cannot follow the slightly faster movements.
The highest these are rated is 6V. Perhaps consider a servo that has faster operating speed.
http://www.spt-servo.com/Product/346029845.html