Just did the MJ1200 mod. It works GREAT. I hooked it up to my old wavemaker. Every few minutes after a planned turn off, it turns back on. The impeller will then rotate the opposite direction to where it was rotating before, pushing water about 45 degrees to the other side! When hooked up to my wavesea it gives a great supplemental boost. The flow is wider and pushes a lot more water. Thanks minh.