I had the main pantry shelves built years ago and it sure makes life easier for me. The other room is just for excess and used to be my soap room which I no longer do. The metal shelves work perfectly for me too. Pressure canning is no big deal, but you do have to watch it the whole time to regulate the temperature evenly throughout. I have to buy a new canner as the one I have is over 30 years old now.