I like your water heater that you made. I was wondering as I was scrolling through the pictures how it heated water but then I saw that you put the water container on top of it and had the water container attached to ( the ceiling?) so it couldn't get knocked off and spill everywhere.
One of my questions is how did you drill the holes in the clay pot? Did you need a special drill bit?
I understand that you cut the square hole (for the electric cord to go in) with the dremel, but what did you use for the small circular holes?
Also, I assume that you already had the pipe strap on hand and that is why it is not on your cost/supply list.
Another thought is that you could explain why you used the springs. I am guessing that it makes it easier to take apart to change the bulb if needed.