Great news.!! . . . Now buy some Lead shine EM806 Digital drives and take it to the next level. They are light years better than those drives you are using now.
Digital drives are SOOOOO much smoother than analog drives and run the motors much cooler and allow higher feed rates still.

With Digital drives and ESS you'll be able to run much higher Micro steps which give smoother running motors. Only way to appreciate the difference is to see it for your self.!