Thats a great job there. Would have loved to see the in between pictures.
I made one in to a stove a couple of years back. Left the valve open, as I could not get it off, then drilled a couple of holes in the top and poured some water via a funnel in to it. Left it a while before getting the angle grinder to it. I still have a couple of bottles left somewhere in the garden. I won't hold you responsible Barry, but if you can give some further info as to how you made the pot and what materials you used, I for one would appreciate it.