Hey, yes, i have many many aeroflo2's and am always interested in watching people replicate them. The way you can attach the laserlines to the inside of your tubes by taking a piece of PVC Pipe, one just larger then the diameter of your line, slice off the end of the pipe a few times with a saw making rings, 4 or 5 per tube is good. Take the rings and glue them with pvc glue to the top left or top right of the tube. When you slide the laser line through the fitting, look in the tube and direct the spray of water so that the jet makes as much noise in there as possible... Remember this system is passive aeroponics, you rely on the little bubbles rupturing the surface area of the water to make the nutrient spray, therefore you need your tubes to be half full of nutrient all the time. Aeroflo2 is a 5050 combo, half submerged deep water culture, half secondary aeroponics. Hope this helps, send pics of u want and i can review them..