Ok, I am changing my setup right now. I have a 6'x10' ScrOG and I am ordering a light mover for it for better results. Thing is I need a light mover that is 9', found them, but I need it to run two lights. Now I know you can get an add-a-light kit to go with them. They normally go on 6' movers though so I imagine they are designed for the other light to be 6' away(I have never seen a light mover in person...). I want to modify it to move two lights on a 9' rail 4.5' apart. The rail has set points where you can set "turn-around" points so I could use that. But can I modify the add-a-light kit to have the other light be only 4.5' away? And should I use a 6 RPM or a 10 RPM?