Myles,
I have some additional progress pictures I will post now. I build the large ones just like smaller ones that I have constructed. You will see in this case I had to join four sheets of styrene for this tank. The maximum sheet size I can buy is 12 inches by 36 inches. This tank works out to 18 inches high by 40-1/16 inches in circumference. The two vertical seams will be hidden by vertical fire-foam piping. The horizontal seam will be visible. I sanded it some but I am sure it will be more visible than the scribed plate seams on the tank. The pictures show the four pieces glued together. I had to take the drawing that was in degrees and convert the nozzle and manway locations to inches of circumference. In addition, I had to convert millimeters to inches because the drawings are metric. You can see how I layed the stairway out in the flat. I marked it with a template I made and glued all the stair treads on.
Alan Graziano
