Just make sure that the drive is compatible with your current controller. Yes, good prices can be had on Chinese products, but buyer beware. Read the fine print about the shipping time and costs. Doesn't hurt to ask them for a pdf copy of the manual first to read up on the drive and motor and see how good (or how poor) the English translation is. It really helps to completely understand your current system. Ask yourself, what position feedback does the controller have/expect? Does that come directly from the motor or from the drive? Etc. P.S. Don't expect that Chinese "Delta" drive and motor to be THE Delta--it's undoubtedly a Chinese clone.