I purchased 3 stepper controllers that have dip switches which allow me to regulate the amps. https://www.pinterest.com/pin/620511654881622915/ The closest I can come to configuring it properly for my 2.8 amp stepper motors is 3.0 amps or 2.6 amps. https://www.amazon.com/dp/B00QG1ZF48/ref=cm_sw_r_pi_dp_U_x_OPdoAbG3S3NF8 Is it ok to set the controller boards to 3.0 or should I set them to 2.6 amps? The Electronics 101 post said it's best to set the amps exactly as the motor specifies, never higher. But that is not an option.