i too am very interested in the diy side of these. but i am wondering you could somehow make the pot farther with sometype of extension that can be set so your plants can grow a little bigger. say the machine startes at 4ft and as the plant grows you can move it out so to 7or8ft. i would prefer like 8 ft, thats almost 4 ft of growth and thats perfect for me. maybe cfls so the plants could get that much closer. or start with it at 8 ft and have the light be able to adjust to closer levels at the begining, this would be about equal to a light mover, closer to the plant at times and other times farther away... i like the thought process. i hope this keeps going.